REPLACING PUMP

Joined
24 Jul 2003
Messages
24,298
Reaction score
1,416
Location
London
Country
United Kingdom
b.o.b. remember that if your replacement pump is the same make as the original you can just change the body - undo allen screws.
 
Sponsored Links
Joined
16 Sep 2003
Messages
7,978
Reaction score
31
Country
United Kingdom
Then again, if the valves are stuck up, it may well be the waterways in the pump are severely restricted, so you may need a complete replacement.
 
B

B.O.B DOLE

ChrisR said:
b.o.b. remember that if your replacement pump is the same make as the original you can just change the body - undo allen screws.

thanks chris would i need to drain down heating and hot water cylinder when changing the pump head
 
Joined
24 Jul 2003
Messages
24,298
Reaction score
1,416
Location
London
Country
United Kingdom
You need to do SOMETHING to stop the boiler water coming out, like draining, bunging or freezing. No the HW cylinder though which isn't connected unless yo have a primatic.

Once the body is off the head you can inspect the rotor. If it's gunged up then oilman's comment is right.

The pump nuts (the 2&1/16th inch ones) can bind on the pump flanges and make it hard to get apart. Yo don't have to do so if you're just changing the body. If you DO have to change the whole pump, it's a lot easier getting hold of the pump head than the whole thing (big pair of grips).
If the pump nuts really bind,cut and split them off.
If your valves are that bad and you care about it, you would be replacing the valves anyway, so just undo the 22mm compression nuts on the valves and dump the lot.

Gate type valves are better than the 1/4 turn ones as a rule but they're a different length, so won't go straight in, usually.
 
Sponsored Links
B

B.O.B DOLE

once the pump as been refitted would i vent the pump by undoing screw at front and turn impellor
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Top