--- product_id: 53221437 title: "100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water" brand: "wiltec" price: "$288.68" currency: USD in_stock: true reviews_count: 13 category: "Wil Tec" url: https://www.desertcart.us/products/53221437-100l-pressure-tank-vessel-expansion-for-domestic-waterworks-pump-epdm store_origin: US region: United States of America --- # 100L capacity for ample water buffering EPDM membrane easily replaceable & drinking water safe Max pressure 5.4 bar with integrated Schrader valve 100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water **Brand:** wiltec **Price:** $288.68 **Availability:** βœ… In Stock ## Summary > πŸ’¦ Elevate your water system game with pressure you can trust! ## Quick Answers - **What is this?** 100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water by wiltec - **How much does it cost?** $288.68 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/53221437-100l-pressure-tank-vessel-expansion-for-domestic-waterworks-pump-epdm) ## Best For - wiltec enthusiasts ## Why This Product - Trusted wiltec brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Premium EPDM Membrane:** Safe for drinking water and designed for quick, hassle-free replacement to keep your system fresh. - β€’ **Generous 100L Capacity:** Ensures consistent water pressure and reduces pump cycling for longer system life. - β€’ **Integrated Schrader Valve:** Easily adjust pre-charge pressure to optimize pump performance and prevent membrane damage. - β€’ **Robust Steel Construction:** Built with high-quality steel sheets welded to UNI-EN standards for durability and reliability. - β€’ **Versatile & Wall-Mount Ready:** Perfect for domestic waterworks, solar systems, and garden pumps with convenient horizontal mounting. ## Overview The WilTec 100L Pressure Tank Vessel is a durable, steel-built expansion tank designed for domestic waterworks, solar, and garden pump systems. Featuring a replaceable EPDM membrane safe for drinking water, it supports up to 5.4 bar pressure and includes an integrated Schrader valve for precise pre-charge adjustments. Its horizontal design with wall-mounting plate ensures easy installation and reliable performance, making it a top choice for maintaining consistent water pressure and extending pump life. ## Description Replacement 100-litre pressure vessel for use in sanitary cold/hot water systems, suitable for nearly all domestic waterworks, solar and pressure maintenance systems, and garden pumps. This pressure vessel (type 100L pressure vessel) will be delivered including the EPDM rubber membrane. The vessel is designed for a maximum pressure of 5.4 bar and will be delivered for a horizontal positioning, including a plate for attaching domestic waterworks and is suitable for wall mounting. The vessel is checked for tightness with up to 5.4 bar water pressure by the producer. It has a 32.89–33.25-mm (1β€³) pump connector. The pressure vessel additionally has an integrated valve (Schrader valve/car tyre valve) to regulate the counter-pressure in the space between tank and membrane. The bore diameter of the feet is 8 mm and the elongated holes on the plate for attaching the pump measure 10 mm. These vessels are made of quality-steel sheets and are welded according to UNI-EN standards and equipped with a heat and ageing resistant EPDM rubber membrane. The membrane can easily be exchanged. About the pre-charge in the pressurised vessel: The pre-charge pressure should be set approximately 0.1–0.2 bar lower than the switch-on pressure of the pump and has to be checked regularly. Any failure of observance may cause damage on the EPDM rubber diaphragm of the pressure vessel. A more accurate calculation results from the formula β€œswitch-on pressure of the pump x 0.9.” Example: Switch-on pressure of the pressure switch of the domestic waterworks is set to 1.5 bar: 1.5 bar x 0.9 = 1.35 bar. This means that the pressure can be set from 1.3–1.4 bar. Important: The pressure of the vessel should only be inflated or deflated after the pressure to the water system has been released beforehand. Attention: It is necessary to have released the air and water pressure before opening of the pressure vessel! Review: Vessel - Excellent price and good quality Review: Good buy - Arrived quickly and safely! ## Features - Advantages of the expansion vessels - Pressue vessels can be used for all types of water. - The water only comes into contact with the membrane. - Easily replace the membrane, EPDM is suitable for drinking water. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004VLEUPA | | Best Sellers Rank | 64,819 in DIY & Tools ( See Top 100 in DIY & Tools ) 278 in Water Pumps & Accessories | | Brand | WilTec | | Brand Name | WilTec | | Capacity | 100 litres | | Colour | 100 L | | Country Of Origin | China | | Customer Reviews | 4.3 out of 5 stars 3,851 Reviews | | Global Trade Identification Number | 04250390813131 | | Item Dimensions L x W x H | 70L x 45W x 47H centimetres | | Item Weight | 11.16 Kilograms | | Item weight | 11.16 Kilograms | | Manufacturer | Wiltec | | Manufacturer Part Number | 50645 | | Material | Steel, EPDM | | Material Type | Steel, EPDM | | Model Number | 50645 | | Product dimensions | 70L x 45W x 47H centimetres | | Unit Count | 1.0 count | ## Product Details - **Brand:** WilTec - **Colour:** 100 L - **Item weight:** 9.7 Kilograms - **Material:** Steel, EPDM - **Product dimensions:** 70L x 45W x 47H centimetres ## Images ![100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water - Image 1](https://m.media-amazon.com/images/I/61Bn8aD3+eL.jpg) ![100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water - Image 2](https://m.media-amazon.com/images/I/81r4WsoQHSL.jpg) ![100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water - Image 3](https://m.media-amazon.com/images/I/71Kdu0avwSL.jpg) ![100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water - Image 4](https://m.media-amazon.com/images/I/81WWKCBHAfL.jpg) ![100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water - Image 5](https://m.media-amazon.com/images/I/71j8ml-PmAL.jpg) ## Available Options This product comes in different **Color, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Vessel *by C***L on 22 October 2025* Excellent price and good quality ### ⭐⭐⭐⭐⭐ Good buy *by M***E on 21 December 2024* Arrived quickly and safely! ### ⭐⭐⭐⭐⭐ Expansion tank *by R***E on 28 June 2025* Well made does the job ## Frequently Bought Together - 100L Pressure Tank Vessel Expansion for Domestic Waterworks Pump EPDM-Membrane Drinking Water - Pressure Tank 24L Vessel Water with EPDM Membrane for Domestic Waterworks Pump - 5-Port Brass Splitter Manifold Distributor 1inch 1/4" Pressure Vessel Expansion --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/53221437-100l-pressure-tank-vessel-expansion-for-domestic-waterworks-pump-epdm](https://www.desertcart.us/products/53221437-100l-pressure-tank-vessel-expansion-for-domestic-waterworks-pump-epdm) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-15*