aj
head of marketing and bargains 
Posts: 536 
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Post by aj on Sept 11, 2023 20:31:10 GMT
On a combi boiler radiator system can you change the bleed valve and blank plug without draining? do i have to be quick will it piss out?
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Post by tomplum on Sept 11, 2023 20:42:10 GMT
turn off both sides of the radiator with the rad valves, relieve the pressure by opening the bleed valve, have towels ready to catch the water, when the water stops running, you have all day to change the blank and bleed valve, If the bleed valve is seized , just lossen the blank cap but unscrewing anti clockwise  |
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aj
head of marketing and bargains
Posts: 536
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Post by aj on Sept 11, 2023 20:48:57 GMT
how much water can i expect tom. is it a raiators worth
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Post by tomplum on Sept 11, 2023 21:36:51 GMT
no, as long as the both valves are working which will isolate the radiator, a pint or so,, will come out so, just go easy and you an tell by the pressure, at first you will get a blast but. that should ease, if it don't, then one of the valve is not shutting off, so you need to, retreat and reform your attack, It may need draining off  |
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aj
head of marketing and bargains
Posts: 536
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Post by aj on Sept 11, 2023 22:12:29 GMT
when i have changed bleed valve and blank valve and opened radiator valves do i just bleed radiator
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aj
head of marketing and bargains
Posts: 536
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Post by aj on Sept 11, 2023 22:33:26 GMT
also do i clean the tread with wire wool or sandpaper
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aj
head of marketing and bargains
Posts: 536
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Post by aj on Sept 11, 2023 22:33:37 GMT
also do i clean the tread with wire wool or sandpaper
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Post by crowsfoot on Sept 12, 2023 9:23:01 GMT
Yes, just bleed the radiator aj - no need for any sanding or wire wool.
Did you just use the black ring washer that's supplied with the new plug for the seal?
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aj
head of marketing and bargains
Posts: 536
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Post by aj on Sept 12, 2023 13:48:47 GMT
no sorry crowsfoot its an already fitted radiator which is leakibg from blank plug
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Post by crowsfoot on Sept 12, 2023 17:33:54 GMT
It's a very common leak to happen aj especially if that black rubber washer has been used.
I'd remove the plug and black washer (if it's not already fell to bits) and wrap the old plugs threads with ptfe and re-use the same plug (it'll be a better job).
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Post by tomplum on Sept 12, 2023 18:20:43 GMT
In that case AJ you could be a hero and,, unwind the screwed plug about one full turn, then wrap ptfe on the thread ( clockwise) and screw it back, its worth a try, have towels and a bowl handy, |
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aj
head of marketing and bargains
Posts: 536
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Post by aj on Sept 12, 2023 22:17:36 GMT
tom can i be a bigger hero and swap plug without draining
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aj
head of marketing and bargains
Posts: 536
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Post by aj on Sept 12, 2023 22:19:29 GMT
i once swapped a radiator valve liv using old nuts and olives
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Post by tomplum on Sept 13, 2023 20:46:55 GMT
tom can i be a bigger hero and swap plug without draining yes,, close both valves, have everything handy, towels on floor, unscrew the plug, the water will come at you, push your thumb in the radiator end, get your new plug wrapped in ptfe and quickly ,,thumb out plug in and screw it in, Warning,, you will get wet but, Its an a adrenaline rush thing and you will love it when you win,,, |
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Post by dickpuller on Sept 14, 2023 5:38:18 GMT
A common one as cf has said. A bit of PTFE & a 22mm spanner.........sorted👍👍
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