12 Hourleey 3 4 Inch Ips Isolator Tankless Water Heater Service Valve Kit Review of 2026 For Leak-Free Descaling

1

Long Term 3/4 Inch IPS Isolator Tankless Water Heater Service

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  9.7
• Brand
  long term

Key specs2

Forged Brass Construction

500 WOG Solid Brass

Included Accessories

PTFE Tape and Relief Valve Included

Pros & cons42

Pros

• One-piece forged brass body with a 500 WOG rating resists drips and leaks
• Includes a roll of PTFE thread tape alongside hot, cold, and relief valves
• Color-coded handles make identifying hot and cold service lines straightforward
• Lead-free solid brass construction prevents corrosion in potable water systems

Cons

• Listing does not state third-party CSA drinking water certification
• Pressure relief valve PSI and BTU ratings are omitted from listed specifications

2

Hourleey 3/4 Inch IPS Isolator Tankless Water Heater Service Valve

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  8.9
• Brand
  Hourleey

Key specs2

Safety and Code Certification

Stamped CSA certification confirms compliance with state and federal drinking water safety standards.

Flow Capacity

Full-Port 500 WOG Core

Pros & cons42

Pros

• CSA certification stamped on water pipe components confirms lead-free compliance
• Full-port ball valves maintain unrestricted domestic water flow rates
• Quarter-turn red and blue handles allow quick line identification and shutoff
• Compatible with standard 3/4-inch gas tankless units from Rinnai, Rheem, and Noritz

Cons

• Does not include supplemental thread sealing tape in the box
• Relief valve exact PSI blow-off rating is not specified in the product description

3

HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure

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  8.9
• Brand
  HYDRO MASTER

Key specs2

Pressure Relief Rating

150 PSI / 200,000 BTU

Water Heater Compatibility

• Rheem and Rinnai
• Navien and EcoSmart
• Standard 3/4-inch IPS connections

Pros & cons42

Pros

• Dedicated pressure relief valve is rated specifically for 150 PSI and 200,000 BTU
• Thick forged lead-free brass carries official CSA drinking water certification
• Full-port 500 WOG ball valves prevent water flow restriction through the heater
• Color-coded levers simplify hot and cold line routing during flush maintenance

Cons

• PTFE thread sealant tape is not supplied with the valve hardware
• Heavy 3.75-pound brass assembly requires firm pipe anchoring during install

4

LIULO TOOL 3/4 Inch IPS Isolator Tankless Water Heater Service

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  8.9
• Brand
  LIULO TOOL

Key specs2

Drain Port Design

Integrated Ports with Brass Caps

Plumbing Compliance

Certified lead-free brass construction features CSA markings for residential potable water lines.

Pros & cons42

Pros

• Integrated drain ports feature threaded brass safety caps to prevent accidental leaks
• Carries verifiable CSA certification for potable lead-free brass plumbing codes
• Full-port internal valve cores deliver high flow without household pressure drops
• Works with major residential gas tankless heaters including Noritz, Rinnai, and Rheem

Cons

• Pressure relief valve blow-off PSI and thermal ratings are not explicitly detailed
• Thread tape is not included and must be sourced separately for installation

5

3/4" EFIELD IPS Isolator Tankless Water Heater Service Valve Kit

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  8.9
• Brand
  EFIELD

Key specs2

Connection Standard

3/4-Inch NPT to 3/4-Inch PEX-B

Discharge Safety Specs

150 PSI and 200,000 BTU

Pros & cons42

Pros

• Direct 3/4-inch PEX-B crimp connection eliminates the need for separate pipe adapters
• Pressure relief valve is clearly rated for 150 PSI and up to 200,000 BTU
• High-flow 500 WOG hose drains include threaded brass safety caps for clean flushes
• Quarter-turn full-port ball valves ensure unrestricted water circulation

Cons

• Restricted to crimp-style PEX-B systems and incompatible with PEX-A expansion rings
• Listing does not state formal CSA certification markings for drinking water

6

Xiny Tool 3/4-Inch IPS Isolator Tankless Water Heater Service Valve

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  8.8
• Brand
  Xiny Tool

Key specs2

Drain Port Design

Safety Caps Included on Flush Ports

Drinking Water Standard

Components feature CSA certification for lead-free residential drinking water installations.

Pros & cons42

Pros

• CSA certification confirms components meet federal lead-free drinking standards
• Threaded brass safety caps protect the integrated drain ports against drips
• Full-port ball valves provide unrestricted water velocity across both lines
• Fits standard 3/4-inch residential and commercial gas tankless water heaters

Cons

• Relief valve PSI threshold and BTU capacity are omitted from listed specs
• Does not include thread sealing tape or extra replacement washers

7

3/4" EFIELD IPS Isolator Tankless Water Heater Service Valve Kit

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  8.8
• Brand
  EFIELD

Key specs2

Expansion Fitting Standard

3/4-Inch NPT to 3/4-Inch PEX-A F1960

Discharge Safety Specs

150 PSI and 200,000 BTU

Pros & cons42

Pros

• Engineered specifically for direct 3/4-inch PEX-A expansion pipe connections
• Pressure relief valve features a verified 150 PSI and 200,000 BTU rating
• Quarter-turn full-port valves allow high flow rate with fast shutoff control
• Integrated 500 WOG drain valves feature threaded brass safety caps

Cons

• Requires dedicated expansion tools and will not fit standard PEX-B crimp rings
• Does not list CSA certification details in the product specifications

8

3/4 Inch IPS Isolator Tankless Water Heater Service Isolation Valve

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  8.2
• Brand
  Iococee

Key specs2

Pressure Handling

600 WOG Valve Rating

Safety and Code Certification

Relief valve features CSA certification alongside a 150 PSI and 200,000 BTU rating.

Pros & cons42

Pros

• Higher 600 WOG pressure rating on isolation valves exceeds typical 500 WOG kits
• Pressure relief valve carries explicit CSA certification rated at 150 PSI and 200,000 BTU
• One-piece gravity forged brass construction reduces body seam leak points
• Integrated drain outlets include secure brass safety caps for flushing hookups

Cons

• Installation thread sealant tape is not provided in the kit
• Heavy forged brass body requires checking clearance around tight heater recesses

9

ThermoMate 3/4 Inch IPS Isolator Tankless Water Heater Service Valve

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  8.2
• Brand
  thermomate

Key specs2

Heater Line Match

Configured for ThermoMate units while maintaining compatibility with standard 3/4-inch gas or electric systems.

Potable Water Verification

CSA Certified Lead-Free Brass

Pros & cons42

Pros

• Directly matched for ThermoMate gas and electric tankless heater connections
• CSA certified lead-free brass construction satisfies drinking water standards
• Quarter-turn red and blue handles provide effortless line identification
• Equipped with full-port ball valves and brass drain port caps for clean flushes

Cons

• Pressure relief valve PSI and BTU output ratings are not detailed in the specs
• Packaged footprint of 7x7x8 inches may require measuring tight utility closets

10

KAINGA Tankless Water Heater Service Valve Kit, 3/4 Inch IPS

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  7.7
• Brand
  KAINGA

Key specs2

Sealing Technology

Integrated EPDM union gaskets provide solder-free, leak-tight connections at the heater connection points.

Pressure Relief Rating

150 PSI Safety Rating

Pros & cons42

Pros

• EPDM union gaskets provide reliable watertight seals without requiring soldering
• Supplied pressure relief valve is rated to protect systems up to 150 PSI
• Heavy 4.06-pound precision-forged brass body with official CSA certification
• Full-port design ensures maximum domestic water volume through hot and cold lines

Cons

• Heavier 4-pound build requires adequate copper or PEX wall strapping support
• Thermal BTU relief rating is not explicitly stated alongside the 150 PSI limit

11

Himaweek Tankless Water Heater Service Valve Kit with Pressure Relief

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  7.5
• Brand
  Himaweek

Key specs2

Flow Capacity

Full-Port 500 WOG Design

Water Heater Compatibility

• Rheem and Rinnai
• EcoSmart and Navien
• Standard 3/4-inch IPS threads

Pros & cons42

Pros

• Matched pressure relief valve features verified 150 PSI and 200,000 BTU specifications
• Full-port 500 WOG brass ball valves preserve household water pressure
• CSA certified lead-free brass meets federal standards for potable water lines
• Color-coded handles make routing hot and cold lines straightforward

Cons

• Excludes PTFE sealing tape, requiring separate purchase before installation
• Listing does not state whether drain caps include retention chains or lanyards

12

MIZUDO 3/4''NPT Tankless Water Heater Service Valve Kit, IPS Isolator

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  7.1
• Brand
  MIZUDO

Key specs2

Form Factor Clearance

3 x 3 x 3 Inch Compact Body

Thread Specification

3/4-Inch MNPT Threaded Ports

Pros & cons42

Pros

• Compact 3x3x3 inch profile allows mounting in extremely tight heater enclosures
• Includes a safety relief valve rated to release pressure up to 150 PSI
• CSA certified lead-free brass construction ensures clean drinking water compliance
• Openable threaded brass caps allow quick garden hose hookup for descaling

Cons

• BTU relief valve rating is not stated in the manufacturer specifications
• Does not include thread tape or spare union washers in the box

Last update on 2026-10-07 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Does the Hourleey service valve kit restrict household water pressure?

No, the kit features full-port ball valves designed to maintain high water flow through both lines. Because the internal channel matches the standard 3/4-inch IPS diameter, water passes straight through without the bottlenecking common in standard valves. Both the hot and cold isolation valves carry a 500 WOG rating, giving you dependable pressure handling during normal household water usage.

Does the package include a properly rated pressure relief valve?

Yes, the Hourleey kit includes a dedicated pressure relief valve alongside the hot and cold isolation valves. For residential tankless setups, relief valves are typically rated for 150 PSI to safely protect against thermal expansion and sudden pressure spikes. Confirm that your specific heater manual specifies 3/4-inch relief threads before mounting it directly to the hot valve body.

Will these 3/4-inch IPS isolation valves fit units from Rheem or Rinnai?

Yes, the 3/4-inch IPS connections thread directly onto standard male fittings used across major gas and electric tankless water heaters, including Rheem and Rinnai. The valves let you isolate the heater completely for maintenance without shutting off the water supply to the rest of the home. If you are setting up an installation such as a tankless water heater for outdoor shower fixtures, confirm whether your lines connect via standard threaded pipe or require PEX adapters.

Is the brass construction certified lead-free for drinking water?

The kit features clean brass construction, but you must check the valve body for specific lead-free or CSA certification stampings required by your local plumbing codes. While some competing kits explicitly document CSA certification for potable water standards, labeling can vary by production run. Always inspect the markings on the brass castings upon arrival to confirm compliance before installing them onto your home drinking water lines.

How do the color-coded handles make routine descaling easier?

The kit uses 1/4-turn red and blue handles so you can instantly tell the hot line from the cold supply line. During an annual flush, turning both handles 90 degrees shuts off the household water connection and isolates the appliance. This allows you to hook up flush hoses directly to the integrated drain ports, circulating descaling solution through the internal heat exchanger without sending vinegar into your home faucets.

What should you verify to prevent leaks at the threads during installation?

Check that all 3/4-inch male threads receive a clean wrap of PTFE thread tape or approved pipe sealant before you screw the valves in place. Make sure internal gaskets sit completely flat inside union connections to prevent weeping around the joints. Tighten each connection firmly with a smooth-jaw wrench, but avoid excessive mechanical force so you do not distort the brass threads or damage the seals.