Hi all, new here.
I have a well maintained 30 year old Weil McClain steam boiler for my house. I flush and fill to the correct line every 2 weeks or so, I lose little or no water, and the house is nice and warm.
The McDonnell Miller 247-2 (or 47-2, not sure) LWC works (has been tested), but the AutoFill part had stopped working years ago. I did not care much, but when my plumber was doing some other work for me about 5 yrs ago, I asked him to look at the problem; and he replaced the 247-2. The autofill worked for 2-3 years, but it does not work now (again). I looked online at the M-M 247-2 manual, and I have wondered if the strainer and cartridge might be clogged with sludge.....no one has ever taken them apart to check.
Is this the likely reason the autofill would stop working? If so, I could easily take the nuts off the bottom to change them, but where do I purchase a new cartridge/strainer(filter)? When changing, I assume I shut off the water first, right? otherwise I will make a flood???