Evening
I was wondering if any one can help.
I wanted to carry out a wet pressure test using Loctite 55 to see how good it was.
I took a brand new radiator - to each of the four outlets / inlets I fitted the following :
1. bleed off port
2. radiator tail with a stop end cap
3. radiator tail with a washing machine fitting which connected on to a pressure gauge.
4. radiator tail with an isolating fitting which crossed over to another washing machine fitting ( this allowed me to use the washing machine water supply to fill the radiator )
I filled and bled the radiator using the mains pressure. The pressure came up to 4.3 bar. I bled of the air and then pressured back to 4.3 bar, where upon I closed the washing machine fitting together with isolating valve and then disconnected the mains water supply.
I left the radiator pressured up for over 30 hours. I checked over all the connections many times using light blue kitchen roll, which goes dark when it is wet and so any leeks would be easy to detect.
I struggled to find any leaks anywhere, even after multiple checks, and yet in 30 hours the pressure dropped to 3.95 bar.
Is this a fair test as I understand the maximum pressure that a domestic CH will ever see is 3 bar before the prv opens ? I also understand that the nominal dynamic pressure, when the CH is running, is somewhere between 1.5 bar and 2 bar on a sealed system.
I used Loctite 55 on all the radiators tails without any apparent issue.
However I just wanted to check - I wrapped the Loctite 55 around the first 2 or 3 threads of the radiator tail - 6 wraps in total cross wrapping the Loctite 55 over itself, rather than following the thread roots.
Is this the correct way to apply Loctite 55 to radiator tails - I appreciate that the fact that I can not find a leak suggests that it is, however as I can see a pressure drop it makes me question myself ?
Cheers
I was wondering if any one can help.
I wanted to carry out a wet pressure test using Loctite 55 to see how good it was.
I took a brand new radiator - to each of the four outlets / inlets I fitted the following :
1. bleed off port
2. radiator tail with a stop end cap
3. radiator tail with a washing machine fitting which connected on to a pressure gauge.
4. radiator tail with an isolating fitting which crossed over to another washing machine fitting ( this allowed me to use the washing machine water supply to fill the radiator )
I filled and bled the radiator using the mains pressure. The pressure came up to 4.3 bar. I bled of the air and then pressured back to 4.3 bar, where upon I closed the washing machine fitting together with isolating valve and then disconnected the mains water supply.
I left the radiator pressured up for over 30 hours. I checked over all the connections many times using light blue kitchen roll, which goes dark when it is wet and so any leeks would be easy to detect.
I struggled to find any leaks anywhere, even after multiple checks, and yet in 30 hours the pressure dropped to 3.95 bar.
Is this a fair test as I understand the maximum pressure that a domestic CH will ever see is 3 bar before the prv opens ? I also understand that the nominal dynamic pressure, when the CH is running, is somewhere between 1.5 bar and 2 bar on a sealed system.
I used Loctite 55 on all the radiators tails without any apparent issue.
However I just wanted to check - I wrapped the Loctite 55 around the first 2 or 3 threads of the radiator tail - 6 wraps in total cross wrapping the Loctite 55 over itself, rather than following the thread roots.
Is this the correct way to apply Loctite 55 to radiator tails - I appreciate that the fact that I can not find a leak suggests that it is, however as I can see a pressure drop it makes me question myself ?
Cheers
