---
product_id: 618789133
title: "Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank"
brand: "watts"
price: "€ 58.01"
currency: EUR
in_stock: false
url: https://www.desertcart.pt/products/618789133-watts-water-technologies-gidds-1030402-watts-expansion-tank
store_origin: PT
region: Portugal
---

# 3/4-inch male connection 3.42 gal max volume Pre-pressurized steel tank Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank

**Brand:** watts
**Price:** € 58.01
**Availability:** ❌ Out of Stock

## Summary

> 💧 Keep your water system calm and efficient with Watts Expansion Tank!

## Quick Answers

- **What is this?** Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank by watts
- **How much does it cost?** € 58.01 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/618789133-watts-water-technologies-gidds-1030402-watts-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

- • **Durable Butyl Diaphragm:** Prevents water-air contact ensuring long-lasting, maintenance-free performance
- • **Universal Compatibility:** Works seamlessly with gas, oil, and electric hot water heaters
- • **Silent Pressure Balancer:** Eliminates noisy pipe banging for a peaceful home environment
- • **Certified Quality Assurance:** IAPMO listed and ANSI/NSF 61 certified for potable water safety
- • **Easy Installation with Pro Tips:** Simple setup with reliable connections—just add extra Teflon tape for a perfect seal

## Overview

The Watts Water Technologies GIDDS-1030402 Expansion Tank features a 3.42-gallon capacity with a durable butyl diaphragm and a pre-pressurized stainless steel tank designed to absorb thermal expansion in potable water systems. Compatible with all direct-fired hot water heaters, it ensures balanced pressure and eliminates pipe noise. Certified for safety and built for longevity, this tank is a must-have upgrade for any modern home plumbing system.

## Description

Series PLT Potable Water Expansion Tanks are designed to absorb the increased volume of water created by thermal expansion and to maintain balanced pressure throughout the potable water supply system. Series PLT tanks feature a pre-pressurized steel tank with an expansion membrane that prevents contact of the water with the air in the tank. This prevents loss of air to the water and ensures long and trouble-free life for the system. These tanks may be used with all types of Direct Fired Hot Water Heaters (gas, oil or electric) and hot water storage tanks. IAPMO listed and ANSI/NSF 61 certified. Maximum Pressure: 150psi (10 bar).

## Features

- Butyl diaphragm
- 3/4-inch male connection
- Pre-pressurized
- Stainless steel inlet
- Acceptance volume: Max 3.42 G at 150psi

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002JEQGYO |
| ASIN  | B002JEQGYO |
| Brand Name | WATTS |
| Capacity | 4.5 gallons |
| Color | Stainless Steel |
| Customer Reviews | 4.6 4.6 out of 5 stars (115) |
| Customer reviews | 4.6 4.6 out of 5 stars (115) |
| Date First Available  | 27 June 2019 |
| Global Trade Identification Number | 00098268095753 |
| Included Components | Watts Potable Water Expansion Tank |
| Is Discontinued By Manufacturer  | No |
| Is Electric | No |
| Item Type Name | Expansion Tank |
| Item model number  | PLT-12 |
| Manufacturer | Wilo |
| Manufacturer  | Wilo |
| Manufacturer Part Number | 67371 |
| Material Type | Alloy Steel |
| Model Number | PLT-12 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Dimensions  | 26.67 x 26.67 x 34.29 cm; 3.95 kg |
| Special Features | Pre-pressurized Steel Tank with Expansion Membrane |
| UPC | 098268095753 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** WATTS
- **Capacity:** 4.5 gallons
- **Colour:** Stainless Steel
- **Material:** Alloy Steel
- **Special features:** Pre-pressurized Steel Tank with Expansion Membrane

## Images

![Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank - Image 1](https://m.media-amazon.com/images/I/51qBGIh6GsL.jpg)

## Frequently Bought Together

- Watts Water Technologies PLT-12 WATTS Expansion Tank, 4.5 Gallon, Gray
- 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 Portugal*
*Store origin: PT*
*Last updated: 2026-10-26*