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mepadre

join:2003-08-15
Waterloo, ON
reply to hm

Re: Sump Pump - Discharge riser freezing

Click for full size
I am attaching a photo that shows various angles.

Top Left - The pit showing the 2 pumps. Check valves are just after each pump.

Top right - An overall of the area. Pit is just next to the black box on the floor (this is the power for the backup pump). The riser is visible behind the 'sink' on the shelf. The top shelf in this photo above the 'sink' is the shelf that is visible in the next picture.

Bottom Left - The area that is freezing. I put a hairdryer on this exit for about 5 minutes and that frees things up.

Bottom right - The outside just immediately after the previous picture.

I gather some of my issue is the 'vent' right next to the pipe. I am going to close that in for the winter and insulate. Last night, the pipe froze again and the temperature in the room was approaching 0 C as measured by a thermometer on the power plug that is visible in the photo.

I am also considering whether plugging the 2 vents in the room plus leaving a 100W bulb on when really cold will produce enough heat during those really cold days to keep things warmer.

HarryH3
Premium
join:2005-02-21
kudos:2

I think that insulating the outside pipe will also help. It will help hold in some of the heat that the pipe/water absorbs from the inside.

Are the vents to provide combustion air for gas appliances???



mepadre

join:2003-08-15
Waterloo, ON

Agreed. I am going to pick up some Big-O end caps and some Roxul or comparable insulation to stuff in for the winter. Will also pick up a short run of pipe heating cable for this cold snap. Will also look at external insulation options but need to be conscious of the fact that this area is the front entrance to my house.

There are no gas appliances in this area. The vents are for air circulation and moisture which is a bigger issue in the summer. Obviously, vents in the winter are causing me issues and will be filled for the season.

I will find out whether insulating the vents and leaving on a 100w bulb holds temperature.



AVD
Respice, Adspice, Prospice
Premium
join:2003-02-06
Onion, NJ
kudos:1

wrap the pipe in a blanket then bury it under some sand.



hm

@videotron.ca
reply to mepadre

Yeah fill in that old vent asap. It likely is the source of the issue.

Dunno if a 100-watt bulb is worth it. I would go with the pipe cable. You only need a very short length of it. See:
»www.homedepot.ca/product/3-ft-el···e/909324
or
»www.homedepot.ca/product/6-ft-el···e/909325

Pennies to run.

Or just remove the check valve and adjust your floats on the pump for a higher water level. your pit look like it can accommodate that with no issue there. It will just raise the water level by maybe 4 inches or so.

Getting back to diameter. It sure does look like they are the same size. Going into and out the wall should be a minimum of 3 inches but I've been reading people use 4 to help prevent freezing as you are having.

For this winter, stuff that old vent with pink insulation or similar and spend the 25$ on the pipe heating cables or remove the check-valves. to solve the issue for the immediate.

I'm thinking in the long run, that if you remove the pipe from against the wall and run it straight up from the pit (against the shelving) and 3 inches higher than the exit, then run a pipe at an angle to the wall exit that this should add enough buffer to prevent freezing and keep it off the wall.

Yeah sure it won't be as pretty, but it will likely prevent this issue from occurring again since you indicate it occur at the exit at wall, only.

So my final answer would be that. If you don't want ugly, then stick with the pipe cable for ~25$ (get 6 feet minimum). Should be a lot less cost to run this than a 100W light bulb. Think this cable is only like 12-watts. Might cost you the same price as a coffee to operate for the season.



cdru
Go Colts
Premium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:7
reply to mepadre

said by mepadre:

I will find out whether insulating the vents and leaving on a 100w bulb holds temperature.

The heat tape is going to do the job better and consume less power than a 100w bulb. Plus it's going to have a thermostat on it so it's only going to kick on when it's needed.


hm

@videotron.ca

BTW, does anyone know what is the best way to insulate that old oil vent hole he has?



alkizmo

join:2007-06-25
Pierrefonds, QC
kudos:1

said by hm :

BTW, does anyone know what is the best way to insulate that old oil vent hole he has?

Id sprayfoam it shut.

HarryH3
Premium
join:2005-02-21
kudos:2
Reviews:
·Suddenlink
reply to hm

He can't remove the check valves. He has TWO pumps, a main pump and a backup pump. With no check valves in place then most of the water will just backfeed through the non-running pump right back into the pit.



hm

@videotron.ca

said by HarryH3:

He can't remove the check valves. He has TWO pumps, a main pump and a backup pump. With no check valves in place then most of the water will just backfeed through the non-running pump right back into the pit.

ah that's right. So we can scratch that one.