Recent content by Phil2003

A bit of a wotsit in what way? There are 3 small bolts holding it in position, and two slim water pipes with push fittings supplying the flow - that's all. It doesn't look difficult. Am I missing something?

I'm about to replace the flow switch (aka differential pressure switch?) on my 15-yr-old Vaillant combi boiler. I'm no plumber but I think I can manage it okay. The snag is that the plumbers' merchant supplying the switch says I'll have to drain the system before fitting the switch and...