what size pump
#1
04-15-06, 11:53 AM
what size pump
the well for my ejector pump (sewerage) is about 3 feet deep and about 21 inches in diameter.
we built the house new, and never had a problem until several years ago, when a plumber put in a 4/10ths hp pump, which was too noisy and backed up in the pipes.
we rigged a fix for that problem, and recently had a plumber re-route the pipes (the construction company had them set up incorrectly in the first place), and that solved much of the problem. but this plumber put in an even larger pump (1/2 horse), without checking the size of the last one.
this pump is way too noisy, and is so cramped in the well it appears to get 'stuck' - toilet paper flowing into the well seems to be landing on the float, and the pump sticks etc.
anyway, i think i'm just going to bite the bullet and buy another pump. the guy at the Ace hardware said about 1/4 horse is all i really need, but i thought i'd check here to be sure, or if you have any other suggestions.
thanks.
we built the house new, and never had a problem until several years ago, when a plumber put in a 4/10ths hp pump, which was too noisy and backed up in the pipes.
we rigged a fix for that problem, and recently had a plumber re-route the pipes (the construction company had them set up incorrectly in the first place), and that solved much of the problem. but this plumber put in an even larger pump (1/2 horse), without checking the size of the last one.
this pump is way too noisy, and is so cramped in the well it appears to get 'stuck' - toilet paper flowing into the well seems to be landing on the float, and the pump sticks etc.anyway, i think i'm just going to bite the bullet and buy another pump. the guy at the Ace hardware said about 1/4 horse is all i really need, but i thought i'd check here to be sure, or if you have any other suggestions.
thanks.
#2
04-16-06, 08:00 AM
First I would say your tank is too small. I would not call it a well. The sewage being flushed into your tank should not be landing on your pump float. You only need a pump that is capable of pumping the total feet of head you need. Head is the feet of difference from the top of your pump to the discharge point. The next thing to consider is how big is your septic tank. Pump dose volume is limited to one percent of tank volume or first compartment. Asume you have a 1500 gallon tank. 1% X 1,500 divide by 100 = 15 gallon dose. A dose volume of 5 % can be used if multiple tanks or compartments are used and the septic tank capacity is doubled.
#3
04-20-06, 10:16 AM
calculating head - horsepower
thanks for the reply.
to clarify, i don't have a septic system, but a sump (ejector) pump well in the basement of my home (i have a seperate sump pump for plain water runoff). the ejector pump serves the basement (8 feet below ground level) and the lower level family room restroom (4 feet below ground level), in our 4-level split-level home.
the ejector well is 3 feet deep and 20 inches in diameter. from the bottom of the well to the ceiling of the basement is 11 feet - that is the point at which the pipes from the well feed into the overhead pipes. the overheads run about 20 feet to the outside discharge point.
so, i guess my question is: how much horsepower do i need in the ejector pump? the last two pumps were .4 and .5 hp each, and both were much too big.
i'm guessing the original pump was around 1/4 horse, but am not sure.
thanks again.
to clarify, i don't have a septic system, but a sump (ejector) pump well in the basement of my home (i have a seperate sump pump for plain water runoff). the ejector pump serves the basement (8 feet below ground level) and the lower level family room restroom (4 feet below ground level), in our 4-level split-level home.
the ejector well is 3 feet deep and 20 inches in diameter. from the bottom of the well to the ceiling of the basement is 11 feet - that is the point at which the pipes from the well feed into the overhead pipes. the overheads run about 20 feet to the outside discharge point.
so, i guess my question is: how much horsepower do i need in the ejector pump? the last two pumps were .4 and .5 hp each, and both were much too big.
i'm guessing the original pump was around 1/4 horse, but am not sure.
thanks again.
#4
04-20-06, 11:37 AM
Most sewage pumps are either .4 or .5 horsepower, although you can get 1/3 hp pumps. Goulds, for instance, has a model WS03B sewage pump that is 1/3 hp. However, that pump will pump about 19 ft/hd, which sounds close to what you need. This particular pump is 12" at it's widest point.
Ron
Ron
