--- product_id: 49212929 title: "– Set of 2L Expansion Vessel and Non-Return Valve" brand: "ariston" price: "AR$255914" currency: ARS in_stock: true reviews_count: 9 category: "Ariston" url: https://www.desertcart.com.ar/products/49212929-set-of-2l-expansion-vessel-and-non-return-valve store_origin: AR region: Argentina --- # Fully UKCA certified for UK installations 2L capacity for optimal pressure control Non-return valve prevents backflow – Set of 2L Expansion Vessel and Non-Return Valve **Brand:** ariston **Price:** AR$255914 **Availability:** ✅ In Stock ## Summary > 💧 Keep your water heater pressure-perfect and worry-free! ## Quick Answers - **What is this?** – Set of 2L Expansion Vessel and Non-Return Valve by ariston - **How much does it cost?** AR$255914 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/49212929-set-of-2l-expansion-vessel-and-non-return-valve) ## Best For - ariston enthusiasts ## Why This Product - Trusted ariston brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Compatibility:** Designed for optional use with Ariston Andris range water heaters—perfect fit guaranteed - • **Durable Alloy Steel Build:** Robust construction ensures long-lasting reliability and peace of mind - • **Compact & Efficient Design:** Space-saving 2L vessel fits easily into your heating setup without hassle - • **Certified Quality Assurance:** UKCA certification means it meets stringent UK safety and performance standards - • **Precision Pressure Protection:** Safeguards your closed water heating system from damaging overpressure ## Overview This Set of 2L Expansion Vessel and Non-Return Valve from Ariston is engineered to protect closed water heating systems by managing excessive pressure and preventing backflow. Fully UKCA certified and crafted from durable alloy steel, it’s optimized for seamless integration with Ariston Andris water heaters, ensuring reliable, long-term performance in UK homes. ## Description Shop Set of 2L Expansion Vessel and Non-Return Valve. Free delivery on eligible orders of £20 or more. Review: Good quality - Came quickly and was soon put to use for the purpose it was designed for Review: Fitted perfectly - Fitted perfectly when installing a water heater, good price too. ## Features - Set of 2L expansion vessel and non-return valve - To protect closed water heating systems from excessive pressure - For optional use with Ariston Andris range water heaters - Model number: 406801 - Fully UKCA certified to be installed in the UK Market. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003ITQXFG | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 131,945 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,298 in Central Heating System Accessories | | Colour | White | | Customer Reviews | 4.2 4.2 out of 5 stars (56) | | Date First Available | 23 April 2010 | | Included Components | 2L expansion vessel, non-return valve | | Item Package Quantity | 1 | | Item Weight | 1.02 kg | | Item model number | 406801 | | Manufacturer | Ariston | | Material | Alloy Steel | | Part Number | 406801 | | Product Dimensions | 12.5 x 12.5 x 23.7 cm; 1.02 kg | | Size | 12.5 cm x 12.5 cm x 23.7 cm | ## Product Details - **Brand:** Ariston - **Exterior finish:** Stainless Steel - **Inlet connection type:** Female Iron Pipe - **Item dimensions L x W x H:** 12.5 x 12.5 x 23.7 centimetres - **Manufacturer:** Ariston - **Material:** Alloy Steel - **Number of ports:** 2 - **Outlet connection type:** BSPT ## Images ![– Set of 2L Expansion Vessel and Non-Return Valve - Image 1](https://m.media-amazon.com/images/I/41pu2caeOwL.jpg) ## Questions & Answers **Q: Have bought ariston 3kw 15ltr under sink heater. is this kit all that is needed to reduce water pressure if needed? any advice? thanks** A: Hi ThereYou'd also need the pressure reducing valve and tundish which you can find in kit form here:https://www.amazon.co.uk/Ariston-Europrisma-Expansion-Vessel-LITRE/dp/B003ITQXFG/ref=sr_1_5?ie=UTF8&qid=1472629858&sr=8-5&keywords=ariston+kit **Q: Is this product suppose to be blue?** A: Good Morning, Thanks for your question. The original Ariston Kit A product is white. If you received a product in a different colour or packaging without an original Ariston label, you unfortunately didn’t receive the branded Ariston product advertised on this listing. Regards. **Q: What is the max pressure and working pressure of this one please, thanks?** A: Good Morning, Thank you for your question. The maximum test pressure for the Kit A is 15 bar, maximum working pressure is 10 bar and the nominal working pressure is 3.5 bar. Kind Regards. **Q: Does it come with a wall mount bracket?** A: Hello, Thanks for your question. Being just a 2 liter expansion vessel doesn’t require a support bracket, it’s enough the pipework to support this unit. At your disposal for further clarification. Thank you. Regards. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality *by S***G on 2 March 2023* Came quickly and was soon put to use for the purpose it was designed for ### ⭐⭐⭐⭐⭐ Fitted perfectly *by P***E on 15 February 2022* Fitted perfectly when installing a water heater, good price too. ### ⭐⭐⭐⭐ Good *by M***S on 11 February 2013* It was bought for a studio flat a year ago and has not given any problems as yet. It is very compact and supplies hot water to a kitchen sink and shower room basin ## Frequently Bought Together - Ariston 406801 KIT A 2L Expansion Vessel & Non-Return Valve, White - Ariston 406802 KIT B 3.5 BAR Pressure REDUCING Valve, Bronze - Ariston ANDRIS LUX ECO 15 L Undersink Electric Water Heater 2.5kW with A Titanium Enamelled Tank, A Class Erp Rating, Copper Heating Element, Manufactured To Be Installed In UK - 3100722, White --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/49212929-set-of-2l-expansion-vessel-and-non-return-valve](https://www.desertcart.com.ar/products/49212929-set-of-2l-expansion-vessel-and-non-return-valve) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-20*