Recommended Pump Combinations (duty,standby)
Recommended Pump Combinations (duty,standby)
(OP)
Hi,
I was wondering what is the most recommended pump combination in the following situations.
1- Underground pump room for a residential swimming pool.
A submersible pump is required for filter backwash, draining the pool...etc.
My current thinking is (duty + 100% standby)
2- Submersible sewage pumps for small basement living quarters (approx 6 people, 3 showers, 3 water closets, 4 washbasins)
A submersible pump is required to lift the toilet sewage up to a manhole of the ground floor.
My current thinking is (duty + 100% standby)
Regards.
I was wondering what is the most recommended pump combination in the following situations.
1- Underground pump room for a residential swimming pool.
A submersible pump is required for filter backwash, draining the pool...etc.
My current thinking is (duty + 100% standby)
2- Submersible sewage pumps for small basement living quarters (approx 6 people, 3 showers, 3 water closets, 4 washbasins)
A submersible pump is required to lift the toilet sewage up to a manhole of the ground floor.
My current thinking is (duty + 100% standby)
Regards.





RE: Recommended Pump Combinations (duty,standby)
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Recommended Pump Combinations (duty,standby)
I hate Windowz 8!!!!
RE: Recommended Pump Combinations (duty,standby)
Swimming pool, probably fixed flow, hardly a big crisis if it breaks so 1 alone should do.
Sewage, if no sump then variable flow and pretty vital it works all the time (!) so 2 x 100% or 3 x 50%
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Recommended Pump Combinations (duty,standby)
If the project is located out in the wilderness, consider purchasing an uninstalled spare pump.
Buy a quality cast iron pump, not something made of plastic.
RE: Recommended Pump Combinations (duty,standby)
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Recommended Pump Combinations (duty,standby)
Duplex pumps also extend the life of the system because of cycling use.
bimr's probably right for residential, but I wouldn't want sewage all over my basement.
RE: Recommended Pump Combinations (duty,standby)
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Recommended Pump Combinations (duty,standby)
Thank you for your response. I had already looked at it before I posted this, but what came to my mind was that power plants have different requirements from residences. I also wanted to get an idea what the standard practice was, away from all of the technical jargon and numbers. And I do find what you mention in your second post to be convincing.
BigInch,
Thank you for your response. Noted.
LittleInch,
Thank you for your response. Noted.
bimr,
Thank you for your response. I'm more inclined to agree with what LittleInch says regarding the sewage pump. Just like jgailla said, nobody wants sewage all over their basement.
jgailla,
Thank you for your response.Noted.
RE: Recommended Pump Combinations (duty,standby)
RE: Recommended Pump Combinations (duty,standby)
For example, you posted "small" basement living quarters but then post "6 people, 3 showers, 3 water closets, 4 washbasins)". Which is it?
For a small basement, one would recommend a single pump while one might recommend multiple pumps for a large basement because of the inconvenience to 6 people should the system fail.
Buildings are commonly required to have overhead sewers when the drain overflow is below the top of the municipal sanitary manhole in the street because of possible sewer backups from the sanitary sewer. Pumps for these overhead systems usually have failure alarms and may have battery backups.
A single pump with battery backup and alarm is probably a better selection than duplex pumps.
There are also other options that can be considered such as upflush toilets.
You also mention a "manhole" on the "ground" floor which would be quite unusual.
RE: Recommended Pump Combinations (duty,standby)