Hi -
I have a Telford's Tristar Thermal store with a Caleffi 533..h PRV set to 3 bar.
The PRV doesn't appear to be drop tight, so static rises from 3 bar to 5.6 bar when no flow.
When I had the thermostat replaced on the cylinder recently the plumber doing the job suggested I should replace the PRV. When I had another plumber out (as the original wasn't available to do the job) to replace it they suggested that it didn't need replacing as it was fine for it to not be drop tight and for the pressure the creep back to mains. It's been like this since install, around 6 years ago.
My question is, who is right and if I do need a drop tight PRV, any recommendations on brand?
I have a Telford's Tristar Thermal store with a Caleffi 533..h PRV set to 3 bar.
The PRV doesn't appear to be drop tight, so static rises from 3 bar to 5.6 bar when no flow.
When I had the thermostat replaced on the cylinder recently the plumber doing the job suggested I should replace the PRV. When I had another plumber out (as the original wasn't available to do the job) to replace it they suggested that it didn't need replacing as it was fine for it to not be drop tight and for the pressure the creep back to mains. It's been like this since install, around 6 years ago.
My question is, who is right and if I do need a drop tight PRV, any recommendations on brand?