---
product_id: 93884686
title: "Amtrol ST-12 Thermal Expansion Tank"
brand: "amtrol"
price: "S/.1042"
currency: PEN
in_stock: true
url: https://www.desertcart.pe/products/93884686-amtrol-st-12-thermal-expansion-tank
store_origin: PE
region: Peru
---

# Energy-efficient Water-saving Pressure control Amtrol ST-12 Thermal Expansion Tank

**Brand:** amtrol
**Price:** S/.1042
**Availability:** ✅ In Stock

## Summary

> 💡 Smart Savings, Safer Living!

## Quick Answers

- **What is this?** Amtrol ST-12 Thermal Expansion Tank by amtrol
- **How much does it cost?** S/.1042 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/93884686-amtrol-st-12-thermal-expansion-tank)

## Best For

- amtrol enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Prevents dangerous pressure build-up, ensuring peace of mind.
- • **Compact Design:** Sleek dimensions (20.32 x 27.94 x 38.1 cm) fit seamlessly into any space.
- • **One Size Fits All:** Versatile design suitable for various systems.
- • **Lightweight Wonder:** Weighing only 1 kg, it's easy to handle and install.
- • **Save Money, Save Resources:** Eliminates energy and water waste, maximizing your savings.

## Overview

The Amtrol ST-12 Thermal Expansion Tank is designed to enhance your home's efficiency by eliminating energy and water waste while preventing dangerous pressure build-up in your plumbing system. With its compact and lightweight design, this tank is easy to install and fits seamlessly into any environment.

## Description



## Features

- Eliminates the waste of energy and water, thus saving money
- Prevents a dangerous pressure build-up in the system
- Prevents the relief valve from going off

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | AMTROL |
| Part Number | ST-12 |
| Product Dimensions | 20.32 x 27.94 x 38.1 cm; 1 kg |
| Item model number | ST-12 |
| Size | One Size |
| Colour | White |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 1 kg |

## Images

![Amtrol ST-12 Thermal Expansion Tank - Image 1](https://m.media-amazon.com/images/I/51Uq0ljbAXL.jpg)

## Questions & Answers

**Q: Is this for potable water?**
A: It is not made for potable water system. But in a regular installation some water from the tank can mix with a potable water. The tank has a polypropylene liner and butyl diaphragm, which may be in contact with water. You have to decide for yourself if you want to drink water from a polypropylene container.

**Q: Can this tank be install horizontally?**
A: Amtrol instruction says: "Mount tank vertically in downward position only. Ensure the piping can support the entire weight of the tank when full of water". This makes sense to me.

**Q: Is this compatable with ethylene glycol?  I want it for the glycol side of a heat exchanger on a solar water heater.**
A: I don't know. It may be best to contact the Amtrol technical support to see if ethylene glycol is compatible with the bladder diaphragm chemistry in this unit.

**Q: what's the capacity in gallons?**
A: It's a 12 liter tank, so it holds approximately 4.4 gallons.

## Frequently Bought Together

- Amtrol ST-12 Thermal Expansion Tank
- HoldRite QuickStrap Universal Expansion Tank Water Heater Wall Mounting Bracket, Stainless Steel, QS-U
- MEASUREMAN 0-200 PSI Water Pressure Gauge, 2-1/2'' Dial, Hose bib Pressure Gauge, Home Water Pressure Tester, Durable 3/4” Hose Thread, Water Pressure Gauge for Home

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---

*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-02-03*