The store will not work correctly in the case when cookies are disabled.
Cookie Policy
We use cookies to give you the best experience on our website. These cookies are safe, secure and
do not contain any sensitive personal information. They are used only by Carboclass Ltd or our
trusted partners. If you continue to use this site, we will assume that you are happy with our
use of these cookies. More details are held in our Privacy Policy.
Altecnic 28mm Eres Straight Bypass Valve is installed between the flow and return of a central heating system and is designed to prevent the central heating pump working against a circuit when zone valves or thermostatic radiator vales are closed. It should be fitted when a boiler bypass is required which becomes particularly important when heating circuits contain a large number of thermostatic radiator valves (TRVs).