Where To Buy Spirit Of Salts?

[TheOP]

I want to descale the plate heat exchager on my boiler this weekend. Where can I buy spirit of salts from?

Also, how long should I leave the SOS in the exchanger for?

Will it damage the metal if left too long?

Will SOS also clean the primary side of the P Hex - not that I think that side is a problem?

Thanks

 

[Terry7556]

toolstation
10-20 mins diluted 50 % (search for cleaning p hex on here)
yes but how long is too long?
not necessary, the advice on here is to put hot water in that side to increase the effect of the SoS in the other side
also spend time flushing and tapping the sides to dislodge/remove the material youve made loose.
if you think about this time taken you can see why repairmen put a new one on, quicker and better

 

[oilboffin]

Try caustic soda it's not so severe

 

[OwainDIYer]

Try caustic soda it's not so severe

caustic soda's an alkali.

limescale's an alkali.

To get a reaction and dissolve the linescale you need an acid. Popular ones for descaling are hydrochloric (spirits of salt) or sulphamic.

Caustic soda or any alkali is a degreaser not a descaler.

 

[mysteryman]

There are plenty of descaler products available. Putting a new heat exchanger in will not clear blockages in other parts of the boiler.

 

[dcawkwell]

Brick acid.

Any builders merchant should have it.