Recent content by Kevinpt

Persistent air problem in hot water/heating (mainly the hot water) About 8 weeks ago I put new TRVs on the radiators, fitted a bypass valve and replaced a 28 year old grundfos pump with a new grundfos Alpha+. This system is a vented gas central heating type with a header tank approx 2m above...

Thanks for your fast responses. I performed the method suggested by Dave and the setting is now 2.5, not too far off the 3 mentioned by Tony. The 25litre/min suggestion indicated a setting of about 2 (based on pump data and the graphs included with the valve). As well as fitting the bypass...

I'm upgrading my central heating system with Thermostatic radiator Valves and an ABV. Do you know the minimum flow rate for an old (but good) BAXI WM 381 CHB boiler set at 51700 BTU/15.15KW, the system use a grundfoss selectric 4 pump, 10 radiators and a mix of 10mm and 8mm microbore. Or...