Pentair Triton TR140 Sand in Pool
- Thread starter josephny
- Start date
I do not think that the pump can go over 3,450 RPM?
The most flow you should ever need is about 40 gpm if you have a heater.
If no heater, then you probably do not need more than 30 gpm.
Can you check the flow from the pump display?
You’re right — 3450 rpm
I do have a heater but I was unaware of the 40gpm goal. I’m pretty sure even at 3000rpm I’m over that.
Is 40gpm optimal for filtration and heating?
I checked the pump and do not see how to read the flow rate.
Here are some pics of the pump, as well as the ground when the backwash comes out.
Attachments
You’re right — 3450 rpm
I do have a heater but I was unaware of the 40gpm goal. I’m pretty sure even at 3000rpm I’m over that.
Is 40gpm optimal for filtration and heating?
Attached
40 GPM is the standard minimum for a gas heater.
Backwash ideal is 15 gpm per sqft.
For a TR-140: (7.06 x 15 = 106 GPM).
The sand on the ground indicates excessive flow rate during backwash.
Flow over 106 GPM can cause sand loss during backwash.
Sand in the pool can be from a cracked lateral.
Backwash ideal is 15 gpm per sqft.
For a TR-140: (7.06 x 15 = 106 GPM).
The sand on the ground indicates excessive flow rate during backwash.
Flow over 106 GPM can cause sand loss during backwash.
Sand in the pool can be from a cracked lateral.
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Some pumps show the flow and some do not.
I would backwash at 2,000 RPM.
Higher than 2,000 RPM can lift sand during backwash.
Backwash at 2,000 RPM and then rinse and see if the problem still happens.
I would backwash at 2,000 RPM.
Higher than 2,000 RPM can lift sand during backwash.
Backwash at 2,000 RPM and then rinse and see if the problem still happens.
I don't know how many feet of head I have, so I can't figure out the RPM to GPM conversion.
I have a flow meter on a pipe, but I'm pretty sure it is broken. Before it broke, 3450 created about 110gpm.
Sounds like 3000rpm should be about right for filtering.
2000rpm for backwash is what I was missing.
I have a flow meter on a pipe, but I'm pretty sure it is broken. Before it broke, 3450 created about 110gpm.
Sounds like 3000rpm should be about right for filtering.
2000rpm for backwash is what I was missing.
I would probably use 2,000 for filtering and backwashing and maybe 2,750 for heating.
It's a 44' x 20' pool with a 9' deep section. There are 3 integrated skimmer-output-returns spaced evenly along one of the 44' walls.
I don't have a way (that I know of) to adjust the speed according to heating or not heating (without rigging up a sensor of some type to determine whether the heater is heating and then change the pump speed.
Does that change the recommendaiton?
Thanks.
This is the flow meter I have installed.
Is there a way to change just the guts of it?
Is there a way to change just the guts of it?
You can replace the parts except for the body.
It might be cheaper to buy the whole part and get the new parts that way.
I opened the flow meter and I see that there is a little piece of broken plastic that holds the flapper around tthe metal shaft so the flapper can rotate.
I put it back on and ran the pump at 3000rpm and I can see that the the corresponding flow is 85gpm.
(The flow meter flapper quickly went back to the non-functioning state after a minute, so I either need to not have a flow meter or spend $150 to replace it.)
At 85gpm, I believe my pool turns over once every 10 hours (or so). My lay person research says that it should turnover quicker than that (6-8 hours), thereby requiring a higher flow rate. Is this correct?
I put it back on and ran the pump at 3000rpm and I can see that the the corresponding flow is 85gpm.
(The flow meter flapper quickly went back to the non-functioning state after a minute, so I either need to not have a flow meter or spend $150 to replace it.)
At 85gpm, I believe my pool turns over once every 10 hours (or so). My lay person research says that it should turnover quicker than that (6-8 hours), thereby requiring a higher flow rate. Is this correct?
Turnover of Pool Water - Further Reading
www.troublefreepool.com
Determine Pump Run Time
To figure out how many hours you need to run your pump, you need to know how fast your pump works. You can find this here.
www.troublefreepool.com
Turnover of Pool Water - Further Reading
Determine Pump Run Time
To figure out how many hours you need to run your pump, you need to know how fast your pump works. You can find this here.
The first link worked and I read the very interesting article. Takeaway: Run the pump with a goal in mind. Happily, I already thought along those lines.
My heater acheives the goal with the current number of hours. The SWG comes up a short (which I correct with a few bottles of bleach every 3-5 days).
The filtration goal is still elusive mostly because of the sand. Otherwise, the water looks and feels clear and clean (I'm a little obsessive about keeping it in balance).
Since you have a vsp you can set it to run lower rpm for efficiency but make sure the speed satisfies the heater and SWCG then you may be able to keep the pool properly chlorinated without manual adding.
Are you suggesting I leave the pump running for more hours each day at a lower speed (but high enough speed to satisfy the heater and SWG minimum speed requirements)?
If so, would it not be wise to keep it at 3000 rpm (85gpm) and just run it longer?