The Altecnic Eres 22mm Straight Automatic Bypass Valve (ER-22MMSTRBI) helps maintain stable water flow and prevent pump over-pressurisation by opening automatically when system pressure rises. Designed for modern central heating systems, it features an adjustable differential setting and a durable brass construction. Its straight 22mm design allows quick installation while ensuring efficient system protection and consistent performance.
The Honeywell Home DU144 22 mm Straight Auto Bypass Valve (DU144A1001) is a robust automatic bypass valve designed to ensure minimum boiler flow, maintain pressure balance and reduce noise in closed‑loop heating systems. With 22mm compression fittings, wide differential pressure range (0.1–0.6 bar) and brass construction, it offers a professional solution for energy‑efficient central heating installations.