---
product_id: 93884573
title: "Watts Regulator PLT-5 Potable Water Expansion Tank"
brand: "watts"
price: "€ 373.15"
currency: EUR
in_stock: true
reviews_count: 13
category: "Watts"
url: https://www.desertcart.sk/products/93884573-watts-regulator-plt-5-potable-water-expansion-tank
store_origin: SK
region: Slovakia
---

# 2.1 gal capacity 3/4" MNPT easy mount High pressure durability Watts Regulator PLT-5 Potable Water Expansion Tank

**Brand:** watts
**Price:** € 373.15
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your hot water system pressure-perfect and worry-free!

## Quick Answers

- **What is this?** Watts Regulator PLT-5 Potable Water Expansion Tank by watts
- **How much does it cost?** € 373.15 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/93884573-watts-regulator-plt-5-potable-water-expansion-tank)

## Best For

- watts enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Carbon steel with epoxy finish ensures long-term durability and corrosion resistance.
- • **Trusted Legacy:** From Watts Water Technologies, a 150+ year leader in innovative water solutions.
- • **Effortless Installation:** Direct mounting to supply piping with standard 3/4" MNPT connection—no extra support needed.
- • **Prevent Costly Failures:** Absorbs excess water volume to stop pressure relief valve from triggering unnecessarily.
- • **Optimize System Pressure:** Controls thermal expansion to keep your heating system safe and efficient.

## Overview

The Watts Regulator PLT-5 is a 2.1-gallon potable water expansion tank designed for closed loop hydronic heating systems. Constructed from durable carbon steel with an epoxy finish and equipped with a reliable expansion membrane, it prevents overpressure by absorbing thermal expansion. Featuring a 3/4" MNPT connection for easy installation, this pre-pressurized tank enhances system longevity and efficiency, backed by Watts' century-long expertise in water technology.

## Description

WATTS WATER TECHNOLOGIES GIDDS-1030401 Potable Water Expansion Tank, Model #Plt-5, Stainless Steel Nipple, 2.1 Gallon, Lead Free

Review: Prevents pressure relief valve from firing - We got our pressure valve fixed and so had to install this to prevent the pressure relief valve from going off on the heater. This was easy to install and has clear instructions: 1: pump to the same pressure as the water pressure 2: install (no need to support it) It's pretty small so make sure to size it appropriately. We have had zero issue and everything is working just fine.
Review: Good quality Tank- paint and threads. - The tank arrived on time and in good condition. Installation was easy. The tank paint and threads were all good quality. It was installed to reduce water pressure changes on my hot water tank. The pressure relief valve was periodically leaking and the expansion tank resolved the problem.

## Features

- WATER EXPANSION TANK: With a 2.1 gallon volume, the Watts Potable Water Expansion Tank is designed for use in commercial and residential closed loop hydronic heating system piping to control the thermal expansion of hot water and maintain system pressure below the relief setting of the relief valve.
- DURABLE CONSTRUCTION: This tank is constructed from high-quality carbon steel with an epoxy finish, ensuring long-lasting performance. It is also equipped with a durable expansion membrane that minimizes the loss of the air charge.
- VERSATILE MOUNTING: This tank is designed for easy installation, mounting directly to the supply piping. It features a 3/4" MNPT system connection for hassle-free mounting.
- HIGH PRESSURE CAPACITY: This pre-pressurized steel tank is built to withstand the demands of hydronic heating systems. It works in tandem with hot water heaters to absorb increased water volume, preventing system overpressure and ensuring the longevity and efficiency of the heating system.
- EVERY DROP COUNTS: Water. It's in our name and close to our hearts. Since 1874, Watts Water Technologies has been delivering innovative technologies that make the world's most precious resource safe and accessible. Everything we design is made to keep the Earth's most precious resource safer, cleaner, and more useful for our customers. Our family of brands offers one of the most varied product lines in the world, with world-class, water-related solutions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002JEODQW |
| Best Sellers Rank | #99,160 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #128 in Water Heaters |
| Brand | Watts |
| Capacity | 2.1 Gallons |
| Color | Gray |
| Date First Available | July 28, 2009 |
| Global Trade Identification Number | 00098268095739 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.01 ounces |
| Item model number | PLT-5 |
| Manufacturer | WATTS WATER TECHNOLOGIES |
| Material | Stainless Steel |
| Product Dimensions | 8"L x 8"W x 11"H |
| Shape | Cylindrical |
| UPC | 098268095739 |

## Product Details

- **Brand:** Watts
- **Capacity:** 2.1 Gallons
- **Color:** Gray
- **Material:** Stainless Steel
- **Product Dimensions:** 8"L x 8"W x 11"H

## Images

![Watts Regulator PLT-5 Potable Water Expansion Tank - Image 1](https://m.media-amazon.com/images/I/51vXeYllAmL.jpg)

## Available Options

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

## Questions & Answers

**Q: if this tank comes recharged at 20 psi can I add air too it if needed? the watts I have now is recharged at 40 but is bad now**
A: Yes air can be added. There is a valve stem at the bottom of the tank. As I recall, I brought the pressure up to 40 lbs. I checked out their website to see what I use for my well pump switch that runs 40 to 60 lbs.

**Q: What is the connection size?**
A: The fitting connection is 3/4" NPT threads.

**Q: This tank will be used on an rv, do any of the tank suppliers offer either a wall mount or cradle type floor mount for the heavier tanks? thanks, ray**
A: Hi Ray, I purchased the same expansion tank, and mounted it on my wall. The bracket I used was called Hydro Claw, by storm king. Its not cheap at about $35 to $40, but it is a well made, heavy duty bracket. Very nice looking install. Even my plumber buddies are very impressed! Highly recomend. Good luck, and stay safe.
Jeff H.

**Q: Rv parks pressure varies. have my incoming pressure set at 40psi. but when using the pump, it comes on at 35psi, & off at 60psi. is this a fit 4 us?**
A: May be helpful, but the pump run pressure range of 15psi is probably normal

## Customer Reviews

### ⭐⭐⭐⭐⭐ Prevents pressure relief valve from firing
*by B***D on January 1, 2024*

We got our pressure valve fixed and so had to install this to prevent the pressure relief valve from going off on the heater. This was easy to install and has clear instructions: 1: pump to the same pressure as the water pressure 2: install (no need to support it) It's pretty small so make sure to size it appropriately. We have had zero issue and everything is working just fine.

### ⭐⭐⭐⭐⭐ Good quality Tank- paint and threads.
*by C***G on September 14, 2020*

The tank arrived on time and in good condition. Installation was easy. The tank paint and threads were all good quality. It was installed to reduce water pressure changes on my hot water tank. The pressure relief valve was periodically leaking and the expansion tank resolved the problem.

### ⭐⭐⭐⭐ Regular price
*by J***E on February 1, 2023*

This tank is easy to install fits perfect on my water heater

## Frequently Bought Together

- Watts PLT-5 - 2.1-Gallon Potable Water Expansion Tank, 3/4" Male Connection w/ Stainless Steel Inlet, Steel, Butyl Diaphragm, Maximum Pressure 150 psi
- Taco 400-4 1/8-Inch-NPT Float Air Hy-Vent
- Watts 0342691 30 PSI Pressure Relief Valve, Bronze, 3/4" 335 M2-030

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-16*