I have a Sea Land T series macerator pump that runs but doesn't pump. I have check all the valves and nothing seems to help.
Any ideas would be appreciated.
Any ideas would be appreciated.
Sea Land Macerator Pump
- Thread starter lakewash
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Lack of use means corroded plate or shaft components. Either take it apart to determine condition or simply replace it.
Not kidding
How do you know it doesn't pump? Really. It could be that your holding tank vent is clogged, thus not allowing the pump to empty the tank because of pressure.
How do you know it doesn't pump? Really. It could be that your holding tank vent is clogged, thus not allowing the pump to empty the tank because of pressure.
It's always a good idea to...
read the instructions BEFORE everything fails...you can download and print 'em from here: http://www.sealandtechnology.com/pdf/600340678 Discharge pump instr.pdf
However, if the pump runs, I'm inclined to agree with Stu: check the tank vent for a blockage that's causing the pump to pull a vacuum. If finally getting around to reading the instructions doesn't solve your problem, you might want to call SeaLand: 800-321-9886.
I have no idea what Don is refierring to, but I don't think he's familair with your pump.
read the instructions BEFORE everything fails...you can download and print 'em from here: http://www.sealandtechnology.com/pdf/600340678 Discharge pump instr.pdf
However, if the pump runs, I'm inclined to agree with Stu: check the tank vent for a blockage that's causing the pump to pull a vacuum. If finally getting around to reading the instructions doesn't solve your problem, you might want to call SeaLand: 800-321-9886.
I have no idea what Don is refierring to, but I don't think he's familair with your pump.
It seems you may have a clog in your tank or hose before the macerator. The pump may be running but has nothing to pump. The pump creates pressure when it has a liquid to push and pull but it does not do very well with air.
OK I don't want to sound condescending but these pump are very durable and are you sure it will not pump ? Even if you put you hand over the suction side you will not feel "pressure"... try a hose into a bucket of water to double check. If it runs and won't pump it is most likely a bad (maybe torn) bellows. there are not that many moving parts to this pump and if the housing is not cracked I would rebuild it if possible.As far as getting it to pump your tank that may be another story. As others said check vents and values etc etc. these are expensive pump to replace and I would make darn sure it was bad before I replaced it.
The SeaLand T-series discharge pump (it isn't a macerator) is basically an electrified version of a manual diaphragm bilge pump. The most common reason it won't pump is that one (or both) duckbills need to be replaced. It is fairly easy to do, albeit odiferous (stinky), and that should be the first thing to check after making certain that the holding tank's vent line isn't plugged-up. The duckbill valves come in sets of two, and both should be replaced at the same time. One on the suction side, one on the discharge side.
Re: It's always a good idea to...
Thanks for all the replies. I did a little more checking and it seems it is putting out pressure in both directions, which would lead me to believe the duckbill valves are not working.
Thanks for all the replies. I did a little more checking and it seems it is putting out pressure in both directions, which would lead me to believe the duckbill valves are not working.
Because...
Duckbill valves are just one way valves...they would not affect the pumps ability to pull waste through it. Make sure your tank vent is clear...if it is, call SeaLand 800-321-9886. (which is what I recommended 6 posts ago).
"Macerator" has become the common name for holding tank overboard discharge pumps...kinda like "Kleenex." "Musherator" would be a more accurate name for the SeaLand pump...but since everything in the tank--at least anything that SHOULD be in the tank--has already liquified, it doesn't need to do any more than pull liquid through it.
Duckbill valves are just one way valves...they would not affect the pumps ability to pull waste through it. Make sure your tank vent is clear...if it is, call SeaLand 800-321-9886. (which is what I recommended 6 posts ago).
I hate to disagree with an expert, but if the duckbills are not working the pump will just push whatever in both directions having the net effect of nothing going anywhere.
There is a warning in the Sealand spec sheet that says if pump is operated without and open seacock the duckbill will be damaged. Since I just purchased this boat, I have a hunch while the boat was being showed to numerous people, the pump was "tested" with the valve closed.
Does any of this make any sense???
There is a warning in the Sealand spec sheet that says if pump is operated without and open seacock the duckbill will be damaged. Since I just purchased this boat, I have a hunch while the boat was being showed to numerous people, the pump was "tested" with the valve closed.
Does any of this make any sense???
You're right...
My brain made a left turn and got lost. And yes, your theory makes sense. Whether that's the problem or not, it can't hurt to replace the duckbills...they should be changed every couple of years as preventive maintenance anyway.
My brain made a left turn and got lost. And yes, your theory makes sense. Whether that's the problem or not, it can't hurt to replace the duckbills...they should be changed every couple of years as preventive maintenance anyway.
Pump
Next time I'm at the boat I'll check on our brand, but our noisy electric overboard pump is impeller driven and in the process grinds up any remaining solids as it empties the holding tank. Each head on our boat also has an electric double ended macerator pump that brings in raw water for flushing on one side and grinds up any solids as it sends the bowl contents to the tank on the other. Pretty much liquifies everything in the process except for those pesky wet wipes used by guests (granddaughter) that I was unaware of until the system became clogged and verbal alarms went off.
Terry Cox
Next time I'm at the boat I'll check on our brand, but our noisy electric overboard pump is impeller driven and in the process grinds up any remaining solids as it empties the holding tank. Each head on our boat also has an electric double ended macerator pump that brings in raw water for flushing on one side and grinds up any solids as it sends the bowl contents to the tank on the other. Pretty much liquifies everything in the process except for those pesky wet wipes used by guests (granddaughter) that I was unaware of until the system became clogged and verbal alarms went off.
Terry Cox
Replaced duck-bills today and it now pumps like it is supposed to. Not only were the valves shot they were not installed correctly.
Thanks to all for the input.
I rest my case about the duckbills!
Oh btw, SeaLand officially calls their T-Series Pump a "discharge pump" - macerator pumps have cutter blades to grind up the waste and toilet paper - SeaLand's doesn't have a cutter blade. Like Peggie said, it's more like a "mush-er-ator pump."
http://www.sealandtechnology.com/productpages.asp?pid=70
Oh btw, SeaLand officially calls their T-Series Pump a "discharge pump" - macerator pumps have cutter blades to grind up the waste and toilet paper - SeaLand's doesn't have a cutter blade. Like Peggie said, it's more like a "mush-er-ator pump."
http://www.sealandtechnology.com/productpages.asp?pid=70
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