Old Watts LWCO sill available

GW

is there any likelihood I could rebuild this low water cut off?

Or, chuck it and put on a 67

it’s a millivolt so that adds to the joy

The lady somehow overfilled the boiler, I took 20 gallons out of it, brought it down to the very bottom of the boiler still wouldn’t shut off.

mattmia2

it is millivolt but it is all wired in romex?

you could probably take it apart and clean, the float is probably just hung up on muck it although replacing it with a MM would be a great idea for safety reasons.

Steamhead

That Watts hasn't been made in a long time. Get a 67-G, not a regular 67- the G is millivolt rated.

Intplm.

Disconnect the copper tubing off of the top and use a hose from a sillcock or any source of street pressure and run water through the top. That should flush the thing clean and get it working.

tim smith

Old Roberts Gordon burner, worked on many of those over the years. Agree on the Macdonal Miller 67-G with quick connects. Supply house is out of stock but cheaper than others. Not avail till around february 11th. https://www.supplyhouse.com/Mcdonnell-Miller-149600-67-G-67-Float-Type-Low-Water-Cut-off-for-millivolt-service-Steam?srsltid=AfmBOoq3m8nT5e2fZVDmT9PO_xSAmXMtLJkk00wNVatR0kXE3YtvlMue

Looks like maybe State supply has one or more in stock, you would need to verify.

https://www.statesupply.com/mh1066?srsltid=AfmBOopIPUDeVFFjYlVIFAPvFENvPurDzQn9EmOvJBXzHZkQufckwvmP

mattmia2

sometimes stuff that supplyhouse.com shows as out of stock or with long lead times miraculously shows up when you order it

GW

@tim smith a couple years ago I posted the same boiler on the wall, I believe. We are chewing through powerpiles, every couple years we have to replace. Somebody mentioned, might’ve been you, we are overheating the powerpile. And there was some gadget that was there at one point, no longer there, that kept the from it from overheating.

Does that make sense? Can you think of any way that we could make the power pile last longer?

tia

mattmia2

some here have sad that the baso thermopiles are better quality than the wr or residio resideo? residewell?

109A_5

I have cleaned my M&M 67 twice in 50 years. I bet that LWCO could be cleaned, you may have to make some custom gaskets. I stopped using the paper gaskets, although they are available for the M&M 67. I made reusable gaskets out of 1/32" silicone rubber sheet material. Makes the job easier.

EBEBRATT-Ed

@GW the Watts is still listed on their web site. Don't know if parts are available. looks like a Smith model 24. They lasted forever.

How many wires into the LWCO. That looks like K & T wiring or maybe old Romex.

Vapor system.

mattmia2

either early romex or individual wires in loom.

EBEBRATT-Ed

@mattmia2

Looks like loom to me as well. That's why I asked about # of wires in LWCO. Loom it's two Romex is 4. Looks like conduit going up overhead from burner so probably a JB up overhead

109A_5

If you look at the cable placement, it looks like there is only one cable to the pressure switch, so I would say two wires per cable assembly (or loom).

One wire per cable assembly would not work unless they used the piping for a return at the pressure switch.