strange situation

[GQuigley67]

installed a hob about 2 months ago, got called back to it because of a smell of gas and discovered a leak at the hob(full new gas system including boiler installed by me) start to doubt myself thinking have i done a tightness test with the isolation valve closed and missed the leak ? anyway fixed the leak redone tightness test and passes, call again tonight its leaking from same spot badly. Is it possible the red fibre washer in the female adapter is for water not gas and is deteriorating, even if it is this i have used gas tape and paste on the male thread. I haven't been back to the house yet the hob has been isolated for now.

He said that he could hear it hissing out, and also confirmed it with soapy.

and before anyone asks my testing equipment is not faulty, had that one already:tounge_smile:

 

[AWheating]

is it the europe style male threaded elbow connection? i hate them, about time a better solution was inplace imo.

most i have come across have thick black fibre washers with them.

 

[GrahamM]

Do not use fiber washer unless you know for a fact it is for gas. B/G have recently issued a safety bulletin due to a number of cases where water grade washers have been used for gas resulting in leaks.

 

[GQuigley67]

that's what made me think it was the washer i work on the scottish exec contract so have meetings with SG, and seen the bulletin. Went back to the house and redone all joints with more tape paste and new washers, doubled up the washer for the hob male connection.

can the gas seep through these types of washers ?

 

[GrahamM]

Standard fiber washers swell to create a seal with water fittings. You wont get the swelling action creating a gas tight seal with water grade washers.

 

[SafeGasInstall]

installed a hob about 2 months ago, got called back to it because of a smell of gas and discovered a leak at the hob(full new gas system including boiler installed by me) start to doubt myself thinking have i done a tightness test with the isolation valve closed and missed the leak ? anyway fixed the leak redone tightness test and passes, call again tonight its leaking from same spot badly. Is it possible the red fibre washer in the female adapter is for water not gas and is deteriorating, even if it is this i have used gas tape and paste on the male thread. I haven't been back to the house yet the hob has been isolated for now.

He said that he could hear it hissing out, and also confirmed it with soapy.

and before anyone asks my testing equipment is not faulty, had that one already:tounge_smile:

gas washers are GREEN by colour !! go and rip it out before is to late mate !!!

get some green washers from local supplier and use some ptfe

 

[SafeGasInstall]

i remember redsaw been in trouble for same issue

 

[GQuigley67]

you can get red ones aswell SGI, I will pick up some tomorrow, when I went back and redone the joints with overkill gas ptfe and paste, i doubled up the fibre washer in the connection. Luckily its my cousin and he stays on the same street so no big deal will just have to do it when his wife isn't in to stop her from flapping 😛