---
product_id: 10542980
title: "John Guest 3/8 Inch O.D. Tube Size x 1/4 Inch NPTF Speedfit to Female Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV501222WP"
brand: "john guest"
price: "₨16893"
currency: LKR
in_stock: true
reviews_count: 13
category: "John Guest"
url: https://www.desertcart.lk/products/10542980-john-guest-3-8-inch-o-d-tube-size-x
store_origin: LK
region: Sri Lanka
---

# FDA & NSF certified for potable water 150 PSI max pressure Tool-free twist-and-lock install John Guest 3/8 Inch O.D. Tube Size x 1/4 Inch NPTF Speedfit to Female Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV501222WP

**Brand:** john guest
**Price:** ₨16893
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your flow with leak-free confidence!

## Quick Answers

- **What is this?** John Guest 3/8 Inch O.D. Tube Size x 1/4 Inch NPTF Speedfit to Female Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV501222WP by john guest
- **How much does it cost?** ₨16893 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/10542980-john-guest-3-8-inch-o-d-tube-size-x)

## Best For

- john guest enthusiasts

## Why This Product

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

## Key Features

- • **Safe for What Matters:** Food-grade EPDM O-rings and FDA/NSF certifications ensure water purity and safety.
- • **Effortless Installation:** Twist-and-lock design means no tools, glue, or soldering—get it done in seconds.
- • **Built to Last Behind Walls:** Durable polypropylene construction approved for permanent, leak-free behind-the-wall use.
- • **Pressure-Ready Performance:** Handles up to 150 PSI at 70°F for reliable plumbing under pressure.
- • **Trusted by Pros, Loved by DIYers:** Top-rated valve with 25-year warranty—join thousands upgrading their plumbing game.

## Overview

The John Guest 3/8 Inch O.D. Tube x 1/4 Inch NPTF Female Shut-Off Valve is a durable, FDA and NSF-certified polypropylene plumbing fitting designed for quick, tool-free installation. Rated for 150 PSI at 70°F, it features food-grade EPDM O-rings for safe potable water use and is approved for permanent behind-the-wall applications, backed by a 25-year warranty.

## Description

Product Description Simplify your plumbing projects with the John Guest female shut-off valve. Made from polypropylene, this push-to-connect fitting requires no tools or glue for a secure, leak-free connection. This plumbing shut-off valve is fitted with food-grade EPDM O-rings and is FDA-compliant. These safe and durable shut-off valves are approved for behind-the-wall applications as a permanent leak-free connection and are certified for use in potable water and hydronic heating system applications. John Guest plastic push female angle shut-off valves are rated at 150 PSI at 70 degrees Fahrenheit and 60 PSI at 140 degrees Fahrenheit. From the Manufacturer JG Speedfit is the easy to use, plastic push-fit system suitable for the plumbing of hot and cold water services and heating applications.

Review: Quality valve - This valve is works great. Very solid feel tuning on and off. No leaks. 😁
Review: Well made RO water tank valve. - Simple tank valve. Appears well made, fitted my RO tank perfectly and easy to install.

## Features

- JOHN GUEST FEMALE SHUT-OFF VALVE: This John Guest female shut-off valve is manufactured in white polypropylene and fitted with food-grade EPDM O-rings; suitable for use with 3/8 inch plastic or soft copper tubing
- EASY TO INSTALL: The twist-and-lock feature of this female angle shut-off valve allows for quick and easy installation, with no tools, crimping, glue, or soldering required
- SAFE, DURABLE, AND HIGH QUALITY: This female shut-off valve is durable and non-toxic; provides excellent chemical resistance; FDA-compliant and NSF 61 and 51 certified
- PREFERRED BY THE PRO: These shut-off valves are for use with potable water; approved for behind-the-wall applications as a permanent leak-free connection
- SPECS: John Guest plastic shut-off valve fittings are rated at 150 PSI at 70 degrees Fahrenheit and 60 PSI at 140 degrees Fahrenheit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003YKF2GU |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #30,493 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #748 in Pipe Fittings |
| Brand | John Guest |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (854) |
| Date First Available | August 20, 2010 |
| Exterior Finish | Plastic |
| Global Trade Identification Number | 00665626120015 |
| Included Components | Valve |
| Inlet Connection Size | 0.38 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Installation Method | Push-to-Connect |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 0.176 ounces |
| Item dimensions L x W x H | 11 x 10 x 4 inches |
| Item model number | PPSV501222WP |
| Manufacturer | John Guest Speedfit |
| Material | Plastic |
| Maximum Operating Pressure | 150 Pound per Square Inch |
| Measurement System | inch |
| Number Of Pieces | 1 |
| Number of Handles | 1 |
| Number of Ports | 1 |
| Outlet Connection Size | 0.38 Inches |
| Part Number | PPSV501222WP |
| Product Dimensions | 11 x 10 x 4 inches |
| Size | 3/8 in. OD x 1/4 in. NPTF |
| Specification Met | NSF 61, NSF 51 |
| UPC | 665626120015 |
| Usage | Amateur, Professional |
| Warranty Description | 25 Years |

## Product Details

- **Brand:** John Guest
- **Exterior Finish:** Plastic
- **Inlet Connection Size:** 0.38 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Item dimensions L x W x H:** 11 x 10 x 4 inches
- **Material:** Plastic
- **Maximum Operating Pressure:** 150 Pound per Square Inch
- **Number of Ports:** 1
- **Outlet Connection Size:** 0.38 Inches
- **Specification Met:** NSF 61, NSF 51

## Images

![John Guest 3/8 Inch O.D. Tube Size x 1/4 Inch NPTF Speedfit to Female Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV501222WP - Image 1](https://m.media-amazon.com/images/I/41jef3-tDgL.jpg)
![John Guest 3/8 Inch O.D. Tube Size x 1/4 Inch NPTF Speedfit to Female Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV501222WP - Image 2](https://m.media-amazon.com/images/I/41v-U0W+9mL.jpg)
![John Guest 3/8 Inch O.D. Tube Size x 1/4 Inch NPTF Speedfit to Female Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV501222WP - Image 3](https://m.media-amazon.com/images/I/61Y0vnoABIL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Cant find the right size! i need the threaded female end to be 3/8 npt and the tube end 1/4 od. can anyone help?**
A: This may or may not help you. But all tanks that have a small threaded outlet are 1/4" if you measure it it will actually measure close to 3/8 but they call it 1/4NPT. As far as I know they do not make a tank shutoff with 3/8NPT threads

**Q: So the outlet of this valve is a 1/4" id and 3/8" od correct?  So 1/4" pex will fit in the outlet as a press fit?**
A: No.  Pex is considered as the same size as copper. 1/4 pex is equal to 5/16" OD or 1/4 CTS

**Q: wjhich way does the valve point when in the on position?**
A: When the valve is open the blue tab is pointing to the fitting on the side, when closed it is 90 degrees to the fitting.

**Q: Will this work on a pureblueh2o tank? the tank looks similar with a 1/4" thread. that system uses a compression nut which is flimsy and leak-prone.**
A: These are classified as universal

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality valve
*by J***B on July 22, 2025*

This valve is works great. Very solid feel tuning on and off. No leaks. 😁

### ⭐⭐⭐⭐⭐ Well made RO water tank valve.
*by K***W on January 30, 2026*

Simple tank valve. Appears well made, fitted my RO tank perfectly and easy to install.

### ⭐⭐⭐⭐⭐ Fits perfectly on top of RO tank. Size and type matter.
*by M***O on November 19, 2024*

It took me a couple orders before I found this one. There are multiple types and sizes of these. The output is 3/8 here, which is the thicker RO tubing. Some of these valves are only 1/4 output, which fit the thin tubes, so best to check the type of tubes in use on your system here. The other end, the end that fits onto the RO tank-- NPTF is the twist on type. They make multiple sizes of this and despite thinking I needed 3/8 on the bottom, 1/4 NPTF seems to be the more common RO sizing. Use a little plumbers tape on the twist on to ensure a smooth/leak free connection. Screw on by hand as tight as you can possibly get it to go. No leaks yet on two of these. The valve does its job. The price on this is a bit steep for what should be a $3 part, but it works perfect and is the only one out there it seems.

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-18*