18 Litre Aquasystems ARB18 Potable Expansion Vessel 3 Bar with Integrated Bracket - XVES050055

Product Information

Expansion tanks are also known as expansion vessels and are used to protect closed water heating systems and domestic hot water systems from excessive pressure. Also when I purchased the description said "The vessels are supplied with a replaceable membrane" , I assumed this meant an extra/spare membrane for the service. The installation was very simple, the engineer powered off the mains of the boiler and replaced the vessel and restarted the system and it was all good.

The main purpose of the vessel is to compensate for the increase in volume of water due to the varying water temperatures in the system, e.

You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. Once this has been reached the membrane will be fully inflated and takes up the capacity of the vessel shell. When water is heated it expands and as water is not compressible this increased volume will create a rise in pressure within the system. I am sure that you check and top up your car tyres every few weeks so why do you not expect your EXV not to be checked for three years at a time. Finance is provided by PayPal Credit (a trading name of PayPal UK Ltd, Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH).

An expansion vessel absorbs the water volume variations in heating systems maintaining constant pressure and help to reduce energy consumption. Surely some have better membranes than others and installers prefer certain makes to others for reliability.All Aquasystem expansion vessels are supplied with a replaceable membrane, which separates the water and air, to prevent contamination of the water system, corrosion of the expansion vessel or pressure loss in the water system. The expansion vessel allows for this extra space, as when water temperature increases the membrane inside the vessel inflates to allow the water to fill the vessel.

Then just unscrewing the flexihose from the cylinder and capturing all the water that comes out, then screwing on the new one once it has been compression tested. If water is required by the system, it starts flowing out of the tank without using the pump but just using the pressure in the air cushion. Bar Reducing 6 Bar Relief Inlet Control Multibloc Valve one piece Reliance ARB24 - Aquasystem 24 Litre 3. The Aquasystems ARB Potable Expansion Vessels are manufactured to comply with UK water regulations and are tested and certified by WRAS. All versions supplied with a replaceable membrane meaning the vessel can be serviced without being removed.Initially I thought the image on the product listing has like an oem - non label and non branded product. When it arrived it had all the labels as on the already fitted ARB18 Expansion Vessel (Baxi Megaflow system) . This seems to be a simple job of emptying the cyclinder below the line in the picture and islolating the feeds.