Gloworm swift flow pressure problem

[Timmy_T]

Hi guy's,

First post and a novice, so please be gentle!

I've had a problem with the pressure bleeding from my system, with many of the symptoms pointing to recharging the Expansion Vessel. I've followed the steps outlined in the Boiler FAQ above, but have a couple of queries.

Having released the pressure and pumped up the EV, the pressure guage rises as well. Do you need to keep releasing this pressure until the EV pressure reads 10 psi and the boiler guage reads 0 bar?

I've just pumped the EV up and accepted this pressure rise without releasing it. Would this account for the 1 bar rise in pressure when I fired the boiler up again (1.0 bar to 2.0 bar, I believe this should be no more than 1.5 bar)?

Many Thanks for your time and patience, TT

 

[kevplumb]

Having released the pressure and pumped up the EV, the pressure guage rises as well. Do you need to keep releasing this pressure until the EV pressure reads 10 psi and the boiler guage reads 0 bar?

yes the system should be open to atmosphere

 

[Timmy_T]

I've done that 5 or 6 times, and each time I repressurize the EV, the pressure guage goes up to about 0.4 bar. Relieve the pressure, pump up EV again, same thing happens.

Do I keep doing it until it stops, or should it only take 2 or 3 times to do it?

 

[kevplumb]

whatever you are using to relive the pressure leave open

 

[Timmy_T]

Many Thanks, Kev, really appreciated

 

[ChrisR]

If it was full of water, you have to displace all of that water, from the system side, by your pumping up the air in the vessel. That's a whole bucket of water!

 

[Timmy_T]

Thought may be the case, but I'm very much a novice at this sort of thing and really appreciate any advice. Thank you

 

[Timmy_T]

I said I was a novice at this thing!!

Having just re-read the FAQ (to the very end and not only half way), I think I may have been extremely fortunate. I used the PRV (with the red cap) to relieve the pressure in the system as I pumped up the EV, but it would appear that it is still doing it's job and not leaking. Phew!

My question is, how do you relieve the pressure properly? I have several drain taps on the downstairs radiators, but would have thought that would just drain the entire system under gravity, or will it just drain until the pressure drops to 0?

Thanks again, and I promise to read it properly next time!!