- This topic has 1 reply, 2 voices, and was last updated 21 years, 1 month ago by SylvanLMP.
23 Mar 2000 at 6:45 pm #278487MasterPlumbersKeymaster
What is the difference between a penestal pump and a submersible pump? I assume it’s the fact that the motor of the pedestal type is never submerged, but who wants to look at it sticking out of the sume all of the time? Aren’t submersible pumps reliable enough to use in a sump application? Are they only good for intermittant use, such as when your floor floods, or can they be submersed in a sump continuously? Also, which is generally quieter?
24 Mar 2000 at 1:15 am #298600SylvanLMP
A “pedestal” pump is a pump motor supported on a column.
A submersible pump sits in the sump pit constantly and it usually costs a little more money.
“Personally I like over kill and use sewer ejectors which most of the ones I use can discharge rocks up to 3/4” in diameter.
The question which is more quiet has to do with the piping the pumps are connected to and the horse power. If you use ANYTHING but cast Iron your looking for noise as plastic is utter garbage UNLESS your pumping some type of acid system. You also have to take into consideration the type of check valve you use on the pump dischage line.Some clatter when the pump is on.
You have to also consider total discharge head ( TDH) when sizing the pumps and the volume you expect to move in GPM or GPH
A lot of the newer “pumps” have a thermo overload protection to prevent pump burn out. The impeller ( material) also has to be taken into consideration as to material used as certain water conditions will destroy a bronze impeller very quickly, and if your planning on pumping hot water say from process piping OR boiler blow down then again you may want to consider a high temperature rated pump, with a stainless steel impeller of composition type.
The problem today is the home centers and some franchises who have no conception on “pump” selection as these folks think one size fits all applications.
Depending on actually useage intended and the flow rate needed this is what should determine the correct pumping applications.
Have fun, and try contacting several manufacturers for information..
Most journeymen/master plumbers have a well rounded education in pumping systems and a local Master
plumber can help you decide the best pump for your particular application. Good luck
- You must be logged in to reply to this topic.