Having problems with hot water (not enough, and lack of pressure) in our only residential shower/tub. We receive decent hot water and pressure through all other sinks in the house.
Here are the facts:
Well water no sub-pump
Very hard water (25gpg) and no water softner/filter yet
Have replaced multiple corroded pipes/pressure valves throughout the house
4 year old Peerless boiler
No external hot water heating tank
Have had plumber/ oil guys / water systems guys out to the house to evaluate the problem.
1st plumber replaced spool and anti scald device in shower, as well as sinks (all had substantial hard water residue), then pipes checked. He recommended acid bathing the coil in the boiler.
2nd had oil guy replace mixing valve on boiler (corroded and stripped only after 4 years), boiler cleaned/serviced. Hot water improved a little after mixing valve replaced. States his company does not acid bath any longer, and that it is an unsafe practice. We should not be doing this.
3rd water systems guy stated that water is so hard in this house, recommendes a softner/filter and that the coil in the boiler is probably corroded as well. He recommended acid bathing the coil.
So in summary, Is acid bathing the coil a common practice and a safe practice? Are there any other possibilities we have overlooked as a cause? We have had too many professionals at the house to not have this problem solved yet.
Thanks in advance,