Hi Jeff,
I used Puritabs Descaling Solution [DScale] from Cleantabs, link
Waterheater Descale, having checked with them that it would be a safe product [01728 603990 or
info@cleantabs.co.uk] I ran the descaler solution to all taps and the shower head, because there was no evidence that the heater had ever been treated in its 6 years life. IIRC, I heated the water for about 30 mins or so to get the temperature to 60 degrees, and then left it for about a further 1/2 hour after switching the heater off to allow the residual heat to raise the water temperature to 70 degrees and then left the solution to do its work [I think I posted details at the time; I know I sterilised the freshwater tank weekend 1 and did the descaling the following weekend, so I'm in danger of mixing the processes together]! I remember that it took about 30 minutes to flush all taps and the showerhead through to remove all traces of the descaler, although I was being very cautious, bearing in mind that the family jewels would be using the shower and I didn't want to risk acid based products on them!
Let me leave this post here for now, as a starter,Jeff, and I'll try to find my original post on the processes. I'll either edit this post, or, if I miss the deadline for alterations, I post a further reply, linking back to this post [hope that makes sense!]
Steve
EDIT from 13 Nov 22 Post [4421?] 'What did you do to your Van Today?' Thread: I'll try to find the first part of the process Post from 12th November for completeness. Below refers to the following day to flush the waterheater, taps and showerhead to remove any calcium/acid residue!
Finished off the Water Heater and Taps descale. Mild panic when there was no initial rush of spluttering air and water at any of the taps or at the shower head. but a further 25 litres of water into the tank solved the problem. Leaving the water. warmed to 'Eco' setting in the system for a wee while to try to pick up any residual bits of calcium on the final flush as well as washing clear any residues of the acid solution used to descale ...
''Warning! Wear gloves when using the solution and avoid contact with skin, wash copiously with water' etc etc. Then use the system to wash your hands or have a shower ...
EDIT 2 from 12 Nov 22 Post 24 Motorhome Electrical Questions: Mr Laird
Been burning some lpg this morning to warm the water in the water heater as the preliminary to descaling the Truma and the shower/taps. Using the Puriclean DScale and checked with their Technical Staff that hot water makes the descaling more effective, but no need to keep the heat on once the boiler is warm. Need to leave the system for at least another hour before flushing with cold water (2 more hours would be better. but daylight will be gone by then!)
EDIT 2 needs to be read before EDIT 1 to get the sequencing right
Steve