brass to iron union

[jps]

Hi all

I have a central heating pump with an iron union fitting and I need to connect it to copper tube, can I use a brass fitting or do I need something to counter potential electrolytic action. An inhibitor will be added to the system on completion.

Many thanks

jps

 

[WHPES]

Most pumps will take standard pump valves to connect to 22mm or 28mm pipework. If your pump is larger than the standard 1 1/2"BSPc size you can purchase reducing bushes from your plumbers merchant

 

[street elbow]

jps,

If it is a black iron fitting it will be OK

If it is a galvanised fitting then its a NO NO.

The zinc in the galvanising will draw the zink out of the brass and you will be left with a pile of copper dust.

If you see the fitting before it leaks it will still be in its original shape and look OK but touch it and it is all dust.


David

 

[jps]

Many thanks

 

[WHPES]

I always fit my pump valves with Copaslip on the threads just in case I ever need to get them off again one day.

 

[Blackcatgas]

I always fit my pump valves with Copaslip on the threads just in case I ever need to get them off again one day.

Good tip there, Iam going to start doing that.