# Expansion Vessel CIMM ACS 12 L for DHW, 2.5/10 bar, -10 to +100 °C, model 511242

**URL:** https://aio.lv/en/product--cimm-511242--10612110
**Data updated:** 2026-03-11 11:54 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** CIMM
**Manufacturer code:** 511242
**EAN:** 8033003521250
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 38.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 31.81 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--cimm-511242--10612110

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

CIMM expansion vessel for domestic hot water (DHW) systems, ACS rated, 12-litre capacity, operating pressure range 2.5–10 bar and temperature range −10 to +100 °C. Designed to absorb thermal expansion in closed potable water circuits, it features a diaphragm design suitable for sanitary use and model number 511242. Suitable for residential and small commercial DHW installations.

## Long description

The CIMM ACS 12 L expansion vessel for DHW is designed to control pressure changes in closed domestic hot water systems. With a 12-litre effective capacity and a diaphragm design approved for potable water (ACS rating), this vessel accommodates thermal expansion and reduces stress on pipes, valves and fixtures. It operates across a temperature range from -10 to +100 °C and is suitable for typical residential and small commercial installations where water hygiene and pressure stability are required.
Advantages
The diaphragm construction separates the potable water from the gas charging chamber, maintaining sanitary conditions while providing reliable absorption of volume fluctuations. A working pressure range from 2.5 to 10 bar allows use in most domestic hot water circuits, and the compact 12-litre size fits easily into plant rooms or under-sink installations. The ACS rating confirms suitability for drinking water applications and compliance with relevant sanitary requirements.
Suitable for
 Residential domestic hot water (DHW) systems
 Small commercial DHW installations such as offices or cafés
 Closed potable water circuits requiring pressure control and expansion compensation
 Retrofitting existing water heaters and storage tanks to reduce cycling and pressure spikes
Key specifications
 Nominal capacity: 12 litres (effective volume for expansion)
 Approved for potable water: ACS-rated diaphragm design
 Operating pressure range: 2.5–10 bar
 Temperature range: -10 °C to +100 °C
 Mounting: compact design suitable for wall or floor-mounted plant spaces
How to use
Install the expansion vessel in the cold-water line of a closed DHW circuit following local plumbing codes and manufacturer mounting recommendations. Ensure the vessel pre-charge (gas pressure) matches the static system pressure before connecting; adjust the pre-charge if necessary using an appropriate valve. Position the vessel so that the water connection is accessible for maintenance and check that all fittings and isolation valves are properly sealed. Regularly inspect for visible damage, leaks or loss of pre-charge and service according to local regulations.
Usage recommendations
Use the CIMM ACS 12 L expansion vessel in systems where potable water compatibility is required. Verify pre-charge pressure at installation and after prolonged downtime, and perform periodic checks to ensure the diaphragm integrity and correct operating pressure. For systems with higher capacity or unusual pressure conditions, consult a heating/plumbing specialist to select a suitably sized vessel.

## FAQ

### How much does the CIMM ACS expansion vessel 12L 511242 cost, and is it available for purchase?

The price is 38.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 101 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All CIMM products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized CIMM service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10612110/68540796_large.webp