Cold water changes the job a scuba regulator must do. As gas pressure drops through a first stage, the parts get cold; add cold water around an unprotected mechanism and an uncontrolled free-flow becomes a real concern rather than a minor annoyance.
This guide to the Best Scuba Regulators for Cold Water separates documented cold-water equipment from general-use equipment. I reviewed every one of the 10 supplied product listings, giving more weight to a stated sealed chamber, thermal insulation, heat exchanger, dry chamber, or an explicit below-50 F claim than to a broad marketing label.
The short answer is that the Cressi MC9-SC/Compact Pro has the clearest listed certification for water below 50 F, while the SCUBAPRO MK25 EVO systems and Aqualung Leg3nd Elite provide the strongest listed freeze-prevention feature sets. A regulator is only one part of the decision: your local training, cylinder valve, backup air source, exposure protection, and service support still matter on every underwater outing.
Table of Contents
The top three cold-water picks are SCUBAPRO, Cressi, and Aqualung systems with documented thermal or dry-chamber features.
These 10 cold-water regulator options show which listings document protection against low-temperature problems in 2026.
Use this overview as a first filter, not as a substitute for an instructor’s recommendation or the manufacturer manual. The two Cressi AC2 products and the DXDiver first stage appear because they are in the supplied catalog, but their listings do not establish them as comparable cold-water primary regulators.
| Product | Specifications | Action |
|---|---|---|
| SCUBAPRO MK25 EVO/S620 Ti |
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 Oceanic Delta 5/EDX |
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| Cressi MC9-SC/Compact Pro |
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 SCUBAPRO MK25 EVO/A700 Carbon BT |
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 DXDiver FS-810 first stage |
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 Cressi AC2/Compact kit |
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 Cressi AC2/XS2 |
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 SCUBAPRO MK11/C370 |
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 Apeks XTX50 Octo |
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 Aqualung Leg3nd Elite |
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1. SCUBAPRO MK25 EVO/S620 Ti is the most adaptable listed system for hose routing and breathing adjustment.
SCUBAPRO MK25 EVO/S620 Ti Diving Regulator System for Scuba Diving, INT
Thermal insulation
Air-balanced piston
Seven-port routing
Pros
- Thermal protection
- Adjustable breathing effort
- VIVA anti-free-flow control
- Flexible hose routing
- Titanium second stage
Cons
- Yoke connection listed
- Limited warranty
I would start with this SCUBAPRO system when the goal is to combine cold-water preparation with an unusually flexible first-stage layout. Its air-balanced flow-through piston has thermal insulation intended to delay ice formation, and the listing identifies two opposing high-pressure ports plus four high-flow and one axial super-high-flow low-pressure ports.
The S620 Ti second stage adds a user-adjustable inhalation-effort knob and a VIVA lever. That lever matters because its stated purpose is to prevent free-flow, which addresses the failure mode cold-water users raise most often in community discussions.
The listed connection is yoke, so I would confirm that choice against the valve standard at the places you visit most. This is also a two-pound system in the provided specifications, an attractive point for someone who wants cold-water features without a bulky setup.
The rating is 4.9 from 24 listed reviews, which is encouraging but still a small sample. I would treat the feature list and a nearby authorized service option as stronger buying signals than that rating alone.
Its port layout suits users who need deliberate hose routing.
The opposing high-pressure ports let the first stage sit either up or down, while the swivel turret and five low-pressure outlets allow more routing choices than a basic first stage. This is useful when a pressure gauge, inflator hose, and alternate air source need to sit cleanly around a thick exposure suit.
Its yoke configuration limits users committed to a DIN valve.
The supplied listing names yoke as both inlet and outlet connection type. A yoke regulator can be the practical match for many cylinders, but a buyer who already uses DIN cylinders should not assume a conversion is included.
2. Oceanic Delta 5/EDX is the flexible connection choice with a listed heat exchanger.
OCEANIC Delta 5 (2nd Stage) + EDX (1st Stage) | Breathing Regulator for Scuba Diving | Strong Cold-Water Performance | Available in Yoke or DIN Version | Yoke, Black
Heat exchanger
DIN or yoke options
Dive-pre-dive switch
Pros
- Heat exchanger
- DIN or yoke options
- Dynamic airflow control
- Nitrox to 40%
- Full manufacturer warranty
Cons
- No environmental seal listed
- Yoke version supplied
The Oceanic Delta 5 with EDX first stage is explicitly presented as having strong cold-water performance. Its documented heat exchanger sits at the hose connection to the second stage, where it is intended to improve thermal behavior.
I like that Oceanic states the set is offered in DIN or yoke versions. That is more helpful than treating valve type as an afterthought, especially for someone who uses different cylinder standards while traveling.
The second stage includes a dive/pre-dive switch and dynamic airflow adjustment control. Those controls give the user a stated way to tune airflow and reduce the chance of unwanted flow at the surface or when the mouthpiece is out of the mouth.
Oceanic also lists use with nitrox mixtures up to 40 percent oxygen without special preparation. The provided listing does not name an environmental seal, so I would ask an authorized Oceanic dealer how the exact EDX configuration fits the temperatures in your planned water.
Its DIN-or-yoke choice suits users who want to match an existing cylinder valve.
The product information is unusually clear on the availability of both connection styles. Pick the version that matches your regular cylinder setup instead of adding an adapter without understanding its effect on the first-stage arrangement.
Its airflow controls suit users who want a hands-on second-stage setup.
The dive/pre-dive switch and dynamic adjustment control are the listed tools for managing the Delta 5’s airflow. Users who prefer a simple, fixed-feel second stage may find those settings unnecessary, while others will value the ability to change the response.
3. Cressi MC9-SC/Compact Pro is the clearest documented pick for water below 50 F.
Cressi MC9-SC/Compact Pro, DIN
Sealed chamber
Below 50 F certified
Hyperbalanced diaphragm
Pros
- Cold-water certification
- Sealed chamber
- Hyperbalanced diaphragm
- Heat-dissipating second stage
- DIN or INT options
Cons
- Compact second stage
- Two-year limited warranty
The Cressi MC9-SC/Compact Pro earns its place because the listing directly says it is certified for cold water and identifies performance in water below 10 C, or 50 F. That is a more usable claim than a vague reference to harsh conditions.
The first stage pairs a balanced diaphragm with Cressi’s sealed-chamber cold-water system. The listed hyper-compensation slightly increases intermediate pressure as cylinder pressure falls, which Cressi describes as support during the final part of a cylinder’s gas supply.
Its Compact Pro second stage uses thermoconductive thermoplastic neopolymer, a material Cressi says dissipates heat for low-temperature performance. The set is offered in DIN and INT versions, and the supplied specifications list a complete DIN weight of 803 grams.
For users looking for a best cold water regulator based on the clearest temperature statement in this product set, this is my evidence-led pick. Its 4.6 rating is based on 76 listed reviews, giving it a broader review sample than most systems here.
Its sealed chamber suits users whose planned water is below the stated 50 F threshold.
The sealed chamber keeps the first-stage cold-water system at the center of the decision rather than treating it as an accessory. Pair that documentable qualification with training suited to local conditions and a properly maintained alternate air source.
Its compact second stage suits users who value lower listed DIN weight.
The DIN configuration is listed at 803 grams for the complete regulator, while the INT version is listed at 943 grams. Those figures give a useful comparison point for someone carrying equipment between sites or setting up a smaller cylinder valve.
4. SCUBAPRO MK25 EVO/A700 Carbon BT is the strongest materials-focused option with listed XTIS insulation.
SCUBAPRO MK25 EVO/A700 Carbon BT Diving Regulator System, DIN
XTIS thermal insulation
Air-balanced piston
Metal A700 second stage
Pros
- XTIS freeze resistance
- Metal valve housing
- Adjustable inhalation effort
- VIVA switch
- Flexible HP orientation
Cons
- Limited warranty
- Small review sample
This version of the MK25 EVO pairs an air-balanced piston first stage with SCUBAPRO’s Extended Thermal Insulating System, or XTIS. SCUBAPRO says XTIS isolates the first-stage mechanical elements from cold while retaining breathing performance.
The A700 Carbon BT second stage brings a metal casing, metal valve housing, and a handmade carbon-fiber front cover. Its Black Tech coating is listed as protection against corrosion and scratches, a welcome specification for regular saltwater use.
I would choose this system for its documented thermal approach and durable second-stage materials, not because carbon alone makes a regulator cold-water ready. The same user-adjustable inhalation knob and coaxial VIVA switch found on higher-control systems are present here.
The supplied specifications identify a DIN300 first stage and a two-pound system weight. Its 4.5 rating comes from 28 listed reviews, so it is sensible to inspect the exact dealer configuration and ask about local service before treating it as a final answer.
Its XTIS system suits users who want an explicit thermal barrier in a piston design.
The listed XTIS system is the reason this model belongs in a cold-water comparison. It is presented as anti-freeze protection that increases breathing reliability in extreme water temperatures, rather than merely as a corrosion-treatment feature.
Its metal A700 housing suits users who place a premium on second-stage construction.
The A700 has metal casing and a metal valve housing, with a carbon-fiber front cover. That combination will appeal to users comparing physical construction, though it does not remove the need for scheduled service and pre-entry checks.
5. DXDiver FS-810 is a basic piston first stage, not a documented cold-water primary-regulator recommendation.
DXDiver Yoke Piston First Stage Regulator FS-810 Underwater World Scuba Diving Equipment Diving Scuba Gear Pony Bottle Underwater Apparatus Deco Stage
Piston first stage
232 bar supply
40% oxygen compatible
Pros
- Piston first stage
- 232 bar supply
- 40% oxygen compatibility
- HP and LP ports
- Light 1.5-pound listing
Cons
- No cold-water claim
- Limited technical details
The FS-810 listing documents a yoke piston first stage with a 232 bar, or 3365 psi, air-supply specification. It also states 40 percent maximum premixed oxygen compatibility and identifies both high- and low-pressure ports.
Those are basic details, but this listing does not state an environmental seal, a heat exchanger, a dry chamber, thermal insulation, or cold-water certification. I would not make it a primary choice for low-temperature underwater use based on the information supplied.
Its listed 1.5-pound weight can make it appealing as a compact component, but the product data is sparse. A 4.5 rating from 12 listed reviews is not a substitute for the missing temperature and sealing information.
This review is included to cover every catalogued product fairly. In a cold-water gear decision, absence of the relevant documentation is itself a reason to pause and ask the manufacturer for a written suitability statement.
Its basic port specification suits users replacing a compatible general-purpose first stage.
The listing confirms high- and low-pressure ports but does not give a detailed port count, orientation plan, or hose-routing diagram. Users considering a replacement component should match those missing details to their existing hoses before ordering.
Its missing cold-water documentation rules it out for users who need verified freeze protection.
There is no stated seal, thermal barrier, heat exchanger, or temperature threshold in the supplied data. For cold water, choose a unit whose manufacturer specifically documents how the first stage limits icing and unwanted flow.
6. Cressi AC2/Compact kit is a simple general-use set with an included alternate air source.
CRESSI Scuba Regulator Kit, AC2 / Compact + Octopus Compact, Black
Piston first stage
Compact second stage
Octopus included
Pros
- Alternate air source included
- Simple piston first stage
- Light configuration
- Italian manufacture
- Two-year warranty
Cons
- No cold-water claim
- Limited warranty coverage
The Cressi AC2/Compact package combines an AC2 piston first stage, a Compact second stage, and an Octopus Compact alternate. The supplied listing characterizes the configuration as light and reliable, and its included alternate is a practical completeness point for a basic set.
I would keep the scope clear: the product data does not claim a sealed first stage, cold-water certification, a heat exchanger, or another specific freeze-resistance feature. That puts it in a different category from the MC9-SC/Compact Pro despite the shared Cressi name.
Its stated materials are 60 percent plastic and 40 percent stainless steel, and the package weight is listed at 35 ounces. The listing says it is suitable for intense use, but that statement is not the same as an explicit low-temperature qualification.
It has a 4.4 rating from 240 listed reviews, the largest review count in this group. I see that as useful evidence that many buyers have experience with it, while still treating cold-water suitability as unproven from the supplied specifications.
Its included octopus suits users who need a complete basic air-sharing arrangement.
The bundle includes the Octopus Compact rather than leaving the alternate air source as a separate decision. Before cold-water use, confirm the alternate’s own ratings and hose placement because both breathing sources need to match the conditions.
Its unlisted thermal protection excludes users seeking a documented cold-water system.
The available product information names a piston first stage but no insulation, seal, or temperature certification. A simple piston mechanism can be useful, yet a cold-water purchase needs the added proof that this listing does not provide.
7. Cressi AC2/XS2 is explicitly rated only for water above 10 C.
Cressi AC2 / XS2, INT
Conical filter
Adjustable Venturi
Above 10 C certification
Pros
- Simple design
- Conical filter
- Adjustable Venturi
- 2100 l/min airflow
- Italian manufacture
Cons
- Above 10 C certification
- No cold-water claim
The AC2/XS2 is the clearest example of why a product roundup should include limitations, not just a score. Its supplied technical details state EN250 2014 A certification for water above 10 C, which is above the 50 F threshold relevant to this guide.
The listing does identify an entry-level regulator with a conical filter, downstream regulation system, adjustable Venturi effect, and supplied airflow of 2100 liters per minute. Those are legitimate features for its stated role, but they do not turn it into a cold-water scuba regulator.
I would select this model only for water within its documented temperature range and after normal setup checks. Using its inclusion here as a buying lesson is more helpful than pretending every regulator in a catalog serves the same conditions.
The 4.4 rating is based on 76 listed reviews. Its two-year limited warranty and straightforward design may suit general users, but the temperature certification should be the deciding fact for a cold-water shortlist.
Its adjustable Venturi suits users who want a simple airflow setting in warmer water.
The listed adjustable Venturi effect is a real second-stage control, and the conical filter is described as having strong filtering capacity. Neither specification changes the manufacturer’s above-10-C certification boundary.
Its above-10-C certification makes it unsuitable for the cold-water use case in this article.
The documented temperature condition is direct and should carry more weight than review averages or a familiar brand name. Do not use this model as the primary regulator for water at or below 50 F based on this product listing.
8. SCUBAPRO MK11/C370 is the balanced-diaphragm option with sealed internal parts.
SCUBAPRO MK11/C370 Diving Regulator System
Balanced diaphragm
Sealed internals
Six-port configuration
Pros
- Sealed internal parts
- Balanced diaphragm
- Six ports
- Adjustable inhalation effort
- Dive-pre-dive lever
Cons
- Limited warranty
- No temperature threshold listed
The MK11/C370 has an air-balanced diaphragm first stage with sealed internal parts, a marine-grade chrome-plated brass body, two high-pressure ports, and four low-pressure ports. That is a credible specification base for someone comparing a diaphragm layout with the SCUBAPRO piston systems above.
The C370 second stage has a user-adjustable inhalation-effort knob, coaxial dive/pre-dive lever, super-flow hose, and compact Hi-Flow mouthpiece. I read those as useful controls for tuning how the second stage behaves before entry and during an underwater session.
The supplied review summary describes good cold-water performance, but the formal technical details do not provide a temperature limit or identify a named thermal insulating system. I would ask SCUBAPRO or a local authorized technician for the exact environmental suitability of the purchased configuration.
It has a 4.1 rating from 35 listed reviews and a listed weight of 3.45 pounds. That makes it a sensible middle-ground model to investigate, not a replacement for a stated below-50-F certification.
Its sealed diaphragm first stage suits users comparing diaphragm systems on their own merits.
A diaphragm design can keep external water away from the internal operating mechanism when paired with appropriate sealing. Here, SCUBAPRO specifically lists sealed internal parts, so that claim has more support than an assumption based on design type alone.
Its unlisted temperature threshold requires users to get model-specific confirmation.
The product information gives several useful construction details but no numerical low-temperature limit. If your local water is consistently under 60 F, ask for written compatibility information and follow the manufacturer service schedule.
9. Apeks XTX50 Octo is a cold-water-compatible alternate, not a complete primary regulator set.
Apeks by Aqua Lung XTX50 Octo Regulator
Cold-water compatible octopus
Balanced second stage
36-inch braided hose
Pros
- Cold-water compatible
- Pneumatically balanced
- High-visibility cover
- Reversible hose
- Braided hose
Cons
- Octopus only
- No first stage included
The Apeks XTX50 Octo is an alternate second stage, not a first-and-second-stage regulator system. That distinction is central: it can strengthen a cold-water alternate air arrangement, but it cannot be evaluated as a complete primary setup on its own.
Apeks explicitly lists cold-water compatibility below 10 C, or 50 F. The octopus is pneumatically balanced, has an adjustable breathing-effort control, a bright yellow front cover, a 36-inch braided hose, and reversible hose routing.
I would pair it only with a compatible first stage that also has a documented cold-water claim. An alternate source needs the same careful attention as the primary, since an air-sharing event is exactly when reliable breathing delivery matters most.
The supplied rating is 4.1 from 18 reviews. The limited review count does not cancel its very specific low-temperature statement, but it does mean you should put more weight on compatibility and service guidance.
Its yellow cover suits users who want a clearly identifiable alternate air source.
The high-visibility yellow front cover makes the XTX50 Octo easy to distinguish from a primary second stage. In a shared-air situation, visible role separation can help a buddy find the intended mouthpiece quickly.
Its octopus-only format requires users to match a cold-water-rated first stage separately.
This product does not include the first stage that manages cylinder pressure. Confirm the first stage, intermediate-pressure compatibility, hose routing, and service support before building the set around this alternate.
10. Aqualung Leg3nd Elite is the feature-rich dry-chamber choice for demanding cold-water setups.
Aqualung Leg3nd Elite Dive Regulator | Cold Water & Extreme Environment Scuba Diving Regulator Set | Over-Balanced First Stage with ACD & Venturi Switch Second Stage, w/Yoke Connector
Over-balanced diaphragm
Permanent dry chamber
ACD closure
Pros
- Permanent dry chamber
- ACD closure
- Over-balanced diaphragm
- Adjustable cracking effort
- Nitrox to 40%
Cons
- Limited review sample
- 3.8 listed rating
The Aqualung Leg3nd Elite is the most complete documented cold-water feature package in this list. Its over-balanced diaphragm first stage has a permanent dry chamber and Auto Closure Device, or ACD, while the listing also calls it suitable for extreme-environment use.
The dry chamber and ACD are meaningful details because they address water exposure around the first stage. Aqualung also lists stainless-steel internal components, an ergonomic Venturi switch, micro-adjustable cracking effort, a Comfobite mouthpiece, and an Aqua Flex hose.
I would put this high on a technical cold-water shortlist if the low review count does not trouble you and there is an Aqualung service option nearby. The supplied data reports a 3.8 rating from only four reviews, which is too little customer feedback to support a sweeping claim about ownership experience.
The listing specifies a DIN thread and nitrox compatibility to 40 percent oxygen. That DIN detail matters for users who want a secure threaded connection and already use compatible cylinders.
Its permanent dry chamber suits users who prioritize keeping first-stage water exposure out of the mechanism.
The Leg3nd Elite states both a permanent dry chamber and ACD, giving buyers two named features to discuss with a technician. This is stronger product-specific evidence than calling a regulator cold-water ready without explaining the mechanism.
Its DIN threading suits users who already use DIN cylinders and want a matching first stage.
The technical details identify a DIN thread size, so this system is not a casual yoke purchase. Match it to your actual cylinder valves, and do not buy around an adapter decision made at the last minute.
A cold-water regulator needs documented freeze protection, the right valve, and maintenance that matches the conditions.
For this article, cold water means water below 60 F, the threshold emphasized in the supplied search research. The more demanding end of the group is at or below 50 F, where the Cressi MC9-SC/Compact Pro and Apeks XTX50 Octo carry explicit below-10-C statements in their listings.
A free-flow is continuous air release from a regulator. Cold can contribute because rapid gas expansion lowers temperature, and moisture or water exposure around the first stage can allow ice to interfere with moving parts.
An environmental seal blocks water from the sensitive first-stage area.
A sealed chamber, dry chamber, or sealed internal-parts design is the product detail to look for first. The Cressi MC9-SC names a sealed chamber, the Leg3nd Elite names a permanent dry chamber, and the MK11/C370 names sealed internals.
Do not assume every balanced regulator has the same environmental protection. A balanced design describes pressure delivery behavior, while a seal or dry chamber describes protection from the surrounding water.
A balanced diaphragm and a balanced piston solve airflow control in different ways.
A balanced diaphragm first stage uses a flexible diaphragm to separate the surrounding water from internal mechanisms. In this list, the Cressi MC9-SC and Aqualung Leg3nd Elite are diaphragm systems, while the SCUBAPRO MK25 EVO systems are air-balanced piston systems.
Neither label alone decides the purchase. Look for the paired cold-water feature: a sealed chamber or dry chamber for a diaphragm design, or stated thermal insulation such as XTIS for a piston design.
A heat exchanger or thermal barrier gives a product-specific answer to icing risk.
Oceanic specifies a heat exchanger on the Delta 5 hose connection. The SCUBAPRO MK25 EVO/S620 Ti lists thermal insulation, and the MK25 EVO/A700 Carbon BT lists XTIS that isolates mechanical elements from the cold.
Cressi takes a different route with thermoconductive material in the Compact Pro second stage. These details do not make products interchangeable, but they show that a credible cold-water claim should point to a physical design feature.
A DIN valve is usually chosen for the cylinder standard, while a yoke is chosen for compatible yoke valves.
DIN first stages thread into a matching cylinder valve; yoke first stages clamp over a compatible valve. The Oceanic Delta 5/EDX has stated DIN or yoke versions, the Leg3nd Elite is listed as DIN, and the supplied MK25 EVO/S620 Ti listing is yoke.
Pick the connection that matches the cylinders you will actually use. A local instructor, operator, or technician can explain the standard at a destination before you commit to a first-stage style.
The so-called 120 rule needs instructor-specific explanation rather than an unsupported one-line formula.
The supplied search research identifies “What is the 120 rule in diving?” as a common question but gives no authoritative definition or training-agency source for it. I would not make a gas, depth, or temperature decision from an internet shorthand whose exact meaning changes by region and training context.
Ask the instructor responsible for your planned site to define the rule they teach and how it applies to exposure protection, depth, water temperature, and emergency procedures. A formal plan based on local conditions is safer than treating a number as a universal limit.
Regular service and dry handling reduce uncertainty before the next cold-water entry.
The research shows that underwater communities care about failure stories and service intervals, yet it does not supply a universal interval. Follow the schedule in the exact manufacturer manual and use an authorized technician for the model you own.
Before an outing, inspect the hoses, mouthpiece, purge, and valve connection, then follow the operator’s recommended pre-entry checks. After use, follow the manufacturer’s rinse and drying instructions rather than improvising a maintenance routine.
Navy approval is a narrow claim that should not be transferred to other models.
The supplied forum research says Mares Abyss Navy II and Poseidon Xstream are the only U.S. Navy-approved cold-water regulators. Neither is among the 10 supplied product listings, so this article does not assign Navy approval to any product reviewed above.
That distinction matters when reading brand discussions. A manufacturer’s listed thermal system or cold-water certification may be persuasive, but it is not the same claim as a particular military approval.
These common questions have short, evidence-led answers.
What scuba regulators do navy SEALs use?
The supplied research identifies Mares Abyss Navy II and Poseidon Xstream as the only U.S. Navy-approved cold-water regulators. Neither is one of the 10 reviewed product listings, and the research does not substantiate a claim about the exact equipment used by Navy SEALs.
What is the 120 rule in diving?
The supplied research flags the 120 rule as a common question but provides no authoritative definition. Ask the instructor responsible for your planned site how any local rule applies to depth, temperature, exposure protection, and emergency planning rather than relying on an unsupported universal formula.
Can you use a cold water regulator in warm water?
The Cressi MC9-SC/Compact Pro listing says its cold-water-certified design is versatile for use anywhere on a trip. For any specific regulator, follow its manufacturer manual and service guidance because the supplied research does not support a universal claim for every cold-water model.
Is Cressi or SCUBAPRO better?
Neither brand is universally better. Cressi MC9-SC/Compact Pro has the clearest stated below-50-F certification and sealed chamber in this group, while SCUBAPRO MK25 EVO systems list thermal insulation or XTIS, adjustable controls, and flexible port layouts. Choose the documented features and valve style that match your water and cylinders.
The best choice is the regulator whose cold-water evidence matches your actual water, valve, and backup plan.
For a clearly stated low-temperature certification, I would begin with the Cressi MC9-SC/Compact Pro. For a thermal-insulated piston system with extensive routing flexibility, the SCUBAPRO MK25 EVO/S620 Ti stands out; for a dry-chamber DIN system, the Aqualung Leg3nd Elite has the most named first-stage protections.
The other lesson from this review is just as useful: a familiar brand, favorable rating, or simple piston first stage does not by itself document low-temperature suitability. For the Best Scuba Regulators for Cold Water in 2026, choose the product with a written temperature claim or specific freeze-resistance feature, then have it serviced and configured for the water where you will use it.