I have a 20 year old Ultimate Boiler with a Beckett burner. I'm the second owner, been in the house about 5 years now. The system was operating with Anti-Freeze in it for years. I've done some research and have successfully saved a lot of oil by firing it correctly, installing a HW+ controller and removing the glycol. Last year it started knocking slightly towards the end of the heating cycle. It's been serviced and cleaned yearly and seems to be in excellent shape. The combustion chamber was replaced last year and the eff. is up there at 85%, burning nice and clean. HW coil is in place as well. I believe the slight knocking might be some sediment inside the boiler so I purchased some Hydro Solve 9100 and pumped it in the other day. I've sampled the water and it looks pretty clean still. I see maybe one or two very small particles in a tin pan. Overall looks clean. Rohmar says leave the Hydro Solve in for a few days or even weeks. I'm not comfortable with that, but do want to let the product do it's thing before I flush and put in Rohmar's 922 conditioner. We do have well water, whole house filtration system is in place. No leaks at all in the system, Extrol tank is pressurized correctly. System runs at 150 - 180 about 15 - 20 psi. Opinions wanted - Leave the Hydro Solve in for a while? Should I be concerned with the slight knock? You only hear it upstairs, yet I can feel it on the pipes at the boiler. It's not loud at all, but at night when it's quiet I hear it. This didn't happen the first or 2nd year in the house, it's only started 2 years ago. When I flushed the glycol out, it got much quieter. Comments appreciated. Tom BTW: Went from 900 gal/year down to 650 gal/year with the changes I've done, so the system is indeed running quite well now. It's amazing what a good controller and the correct firing rate does for a system.

I have an older Taco 110-338 circulator pump on my forced hot water heating system. It is leaking at the seal whenever the pump is operating, pretty steady drip and pretty obviously a seal. Is a seal kit available for this old thing? I couldn't find one. There is a pump head available that would be used with my existing motor and it costs about $100.00 and I'd need to put it in. Doable but am I wasting my time? Is the Taco 007 series the kind of pump that is in use today to replace the 110-338? Would I be able to easily figure out how to wire it in based on how the existing pump is wired? The leak is all that's wrong, pump still pumps but basement is getting a bit messy. Thanks for any and all advice.