---
product_id: 3586308
title: "Webstone, a brand of NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit, Hot & Cold, Full Port, Hi-Flow Hose Drains, Pressure Relief Valve Outlet, Adjustable Packing Glands, 3/4 in"
brand: "webstone"
price: "€ 179.45"
currency: EUR
in_stock: true
url: https://www.desertcart.sk/products/3586308-webstone-a-brand-of-nibco-e-x-p-e2-tankless
store_origin: SK
region: Slovakia
---

# Hi-flow hose drains with 500 WOG rating 150 PSI / 200,000 BTU pressure relief valve 3/4 inch full port size Webstone, a brand of NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit, Hot & Cold, Full Port, Hi-Flow Hose Drains, Pressure Relief Valve Outlet, Adjustable Packing Glands, 3/4 in

**Brand:** webstone
**Price:** € 179.45
**Availability:** ✅ In Stock

## Summary

> 🔥 Elevate your tankless water heater game with Webstone’s precision flow control! ⚙️

## Quick Answers

- **What is this?** Webstone, a brand of NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit, Hot & Cold, Full Port, Hi-Flow Hose Drains, Pressure Relief Valve Outlet, Adjustable Packing Glands, 3/4 in by webstone
- **How much does it cost?** € 179.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/3586308-webstone-a-brand-of-nibco-e-x-p-e2-tankless)

## Best For

- webstone enthusiasts

## Why This Product

- Trusted webstone brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Durable forged brass construction backed by a lifetime warranty when professionally installed
- • **Compact Powerhouse:** Space-saving design packs full-port brass valves into a sleek 9x4x7 inch frame
- • **Lead-Free Assurance:** Meets strict federal & state lead standards for safe drinking water
- • **Ultimate Flow Control:** Full port valves with hi-flow hose drains ensure maximum water efficiency
- • **Certified Peace of Mind:** NSF/ANSI 61-8 certified and compliant with AB1953 & Annex G lead requirements

## Overview

The Webstone NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit features 3/4 inch full port forged brass ball valves with hi-flow hose drains and a residential pressure relief valve rated at 150 PSI/200,000 BTU. Lead-free and NSF/ANSI 61-8 certified, this compact, durable kit ensures safe, efficient water flow and pressure relief for modern tankless water heaters, backed by a lifetime warranty when professionally installed.

## Description

Product Description               3/4 IPS LEAD FREE ISOLATOR EXP E2 w/LEAD FREE PRESSURE RELIEF VALVE TANKLESS WATER HEATER SERVICE VALVES - HOT & COLD SET - FULL PORT BRASS BALL VALVES w/ADJUSTABLE PACKING GLAND, HI-FLOW HOSE DRAINS (500 WOG) & PRESSURE RELIEF VALVE (150 PSI/200K BTU)                  From the Manufacturer               Hot and cold set of full port forged brass ball valves with hi-flow hose drains and pressure relief valve outlet.

## Features

- Lead Free - Meets all federal & state standards for lead levels in drinking water system components.
- Size is 3/4in
- Tankless Water Heater Service Valves
- 1 per carton - 10 per case - Individually Priced & Sold
- Includes a residential pressure relief valve (150 PSI/200,000 BTU)
- 500 WOG
- 4444 series - IPS Union x IPS
- Compact version of Webstone's original Isolator EXP
- Certified to NSF/ANSI 61-8 and comply with the lead requirements of AB1953 and Annex G

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Webstone |
| Part Number | H-44443WPR |
| Item Weight | 2 pounds |
| Product Dimensions | 9 x 4 x 7 inches |
| Country of Origin | China |
| Item model number | 44443WPR |
| Is Discontinued By Manufacturer | No |
| Size | 3/4 |
| Color | Brass |
| Material | Brass |
| Item Package Quantity | 1 |
| Measurement System | inch |
| Included Components | valve |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Webstone, a brand of NIBCO warrants all of its products to be free from manufacturing defects in material and/or workmanship for the life of the product provided they are professionally installed and operated under normal conditions. Webstone will replace, FREE OF CHARGE, any product or part thereof that proves defective in material and/or workmanship under normal installation, use and service. |

## Product Details

- **Material:** Brass
- **Brand:** Webstone
- **Item dimensions L x W x H:** 9 x 4 x 7 inches
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 3/4 Inches
- **Inlet Connection Type:** IPS Union
- **Outlet Connection Type:** G Connector
- **Maximum Operating Pressure:** 1.5E+2 Pound per Square Inch
- **Number of Ports:** 5
- **Global Trade Identification Number:** 01018394440431

## Images

![Webstone, a brand of NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit, Hot & Cold, Full Port, Hi-Flow Hose Drains, Pressure Relief Valve Outlet, Adjustable Packing Glands, 3/4 in - Image 1](https://m.media-amazon.com/images/I/81nn+7roTuL.jpg)
![Webstone, a brand of NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit, Hot & Cold, Full Port, Hi-Flow Hose Drains, Pressure Relief Valve Outlet, Adjustable Packing Glands, 3/4 in - Image 2](https://m.media-amazon.com/images/I/5158CnsuLrL.jpg)
![Webstone, a brand of NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit, Hot & Cold, Full Port, Hi-Flow Hose Drains, Pressure Relief Valve Outlet, Adjustable Packing Glands, 3/4 in - Image 3](https://m.media-amazon.com/images/I/41eFAVovQcL.jpg)
![Webstone, a brand of NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit, Hot & Cold, Full Port, Hi-Flow Hose Drains, Pressure Relief Valve Outlet, Adjustable Packing Glands, 3/4 in - Image 4](https://m.media-amazon.com/images/I/41p9nTcndcL.jpg)
![Webstone, a brand of NIBCO E-X-P E2 Tankless Water Heater Service Valve Kit, Hot & Cold, Full Port, Hi-Flow Hose Drains, Pressure Relief Valve Outlet, Adjustable Packing Glands, 3/4 in - Image 5](https://m.media-amazon.com/images/I/312HYiR7V4L.jpg)

## Questions & Answers

**Q: What is the difference between this one and RTG20220AB? Can I buy this instead of RTG20220AB?**
A: There is no actual difference, those are for use with a water heater, I recently purchased the Webstone 44443WPR to install a Tankless Water Heater, works fine.

**Q: Hi, the valve kit needs Male NPT thread at both ends, is it right ? Thanks.**
A: Yes, there is NPT female threading at both ends on the 44443WPR, that require male NPT for connection.

**Q: Will this work with a noritz nrc661-dv-ng tankless water heater?  thank you.**
A: I am not all that familiar with this tankless heater but would assume it works the same as all others and the valve should work great.   Not it is for maintainence of the the heater.   The heat exchanger will get covered with minerals from the water over time and cuts down on the efficiency of the unit.   This valve system simplifies the hookup of a pump in a bucket of white vinegar which you them hook up and ciruculate through the heat exchanger for approximately 45 minutes.   note you put the pump in a 5 gal bucket of vinegar.  install a water hose between the pump and the inlet connection of the heater.  use another hose to connect to the outlet connection of the heater and run to to the bucket so it will be reciruculated as noted above 45 minutes

**Q: Hi. is this compatible with ecosmart tankless models ?**
A: This Webstone Isolation valve set will work with most all tankless water heaters that have a 3/4" NPT connection, but if not then you can just get a 1/2" - 3/4" adapter at any hardware store to connect it.  GlobalTowne is an authorized Webstone distributor.

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-08*