Max allowed mains water pressure for a condensing combi boiler?

Have a google for your model's manual/spec and see what it allows. 4 bar isn't particularly high so, IMO, any device that can't cope with that should have a PRV in it already!

Ugh. No wonder you think 4 bar's high!! You'll find it a lot nicer when you get mains pressure at the taps, etc.

Scott

My mains pressure can get to about 5 - 6 bar late at night and the Vaillant has lived with it for about 12 years.

And wet feet and front as the water shoots out the tap so damn fast it scoots around the basin and over the side or ina sink just bounces out. Then of course the taps may well sing at sensible flow rates as they are only open a fraction if a mm.

Put a 6 litres flow regulators on the hot and the cold they also are isolators as well.

Also put them on the toilets, basins and dishwaters etc. No need on baths or showers.

These balance the hot and cold water system. The shower is not greatly affected when the kitchen taps are turned on.

These are essential on main water systems. Bathroom changing k*****ad plumbers never put them on.

I would have to agree here. The BES "regulators" (really restrictors) are basically a slightly oversized ball valve which allow a small 1x1cm cylindrical cartridge to be fitted. The cartridges are available in a variety of nominal flow rates and do work well IME.

The valves are "regulators". If the cartridge says 6 litres, it gives 6 litres. Restrictors are different.

Yes and yes.

Yes, but if there is no problem with the cold water tank it'll probably be better to leave the toilets connected to it so as to have a water reserve and it keeps the toillet fill quiet, which is significant for night time use.

Yes and yes.

Yes, but if there is no problem with the cold water tank it'll probably be better to leave the toilets connected to it so as to have a water reserve and it keeps the toillet fill quiet, which is significant for night time use.

Torbeck, or similar equilibrium valves, are quiet even on mains pressure, just fit the appropiate flow restrictor. Who still uses slow, noisey, ball valves in loo cisterns?

I would my modern ones are extremely noisy.

Jonathan

Plenty of people - they're a third of the price.

is it possible to buy the flow restrictors on their own without replacing the toilet cistern's innards when converting from cold water tank to mains pressure?

That would be why the manufacturer calls them equilibrium valves, then.

Agreed.

Agreed. Many times I've fitted a replacement Torbeck only for the new one to fail in two years. They don't seem to like chalky water much.

Ask Opella? I might have the same problem here if I switch some of the cold supply from gravity to mains. I do know I have a pot of restrictors somewhere as I saw them the other month but where that somewhere is is another matter...