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I'm wondering if you have (aged) service valves or tap connectors that are reduced bore?
I was unaware that the option existed until I fitted service valves to both our toilet cisterns a couple of years ago. The reduced bore service valves did not really matter for these, (who cares if the cistern takes a bit longer to refill?), but did have to seek out full bore 15mm service valves for the upstairs bathroom hand basin.
mespilus
@GreatSince78
Gents, does anyone have any idea what could be causing weak water pressure from my upstairs sinks and showers. I've always put up with it as the showers and taps etc are still useable but it's annoying me as I've just renovated one bathroom and want to tackle the ensuite next, but buying/installing more new fittings only for their performance to be crap is really annoying, thoughts?
The issue has been present since purchasing the house back in 2006, it hasn't got any worse, and the water pressure elsewhere on the ground floor is fine. I'm not certain but I think the system is a gravity fed one, with a cold water tank in the loft, a hot water tank upstairs and a gas boiler on the ground floor.
I was thinking about having a couple of shower pumps fitted, but thought I'd consult the hive mind before calling round some plumbers, any ideas great,y appreciated, thanks.