Pentair Lateral Underdrain for 26" Filter$1799
Quick overview
- Genuine Pentair New OEM part 55025800, not an aftermarket lateral.
- For 26 inch filters Sized for the 26 inch Pentair Meteor and Eclipse sand filters.
- 3/4 inch MPT thread Threads into the hub, so check the thread as well as the length before ordering.
- Measured for a match 5-11/16 inches long by 7/8 inch in diameter.
- Slots hold the sand back The lateral lets filtered water out while keeping the sand bed in the tank, so a cracked one puts sand in the pool.
- Inspect the full set Laterals crack from age and from careless sand changes, so check every one while the tank is open.
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Product details
Pentair 55025800 is the lateral underdrain for the 26 inch Meteor and Eclipse sand filters. It is a new genuine Pentair part.
What a lateral does
Laterals sit at the bottom of a sand filter, threaded into the hub around the standpipe. They are slotted so that filtered water can pass through into the standpipe while the sand bed stays where it is. That slot width is the whole design. Once a lateral cracks or a slot opens up, sand runs straight through the filter and comes back into the pool through the returns.
Fitment and installation
This lateral measures 5-11/16 inches long by 7/8 inch in diameter and threads in with a 3/4 inch MPT connection. Length, diameter and thread all have to match, so check all three against the one you removed. While the sand is out and the hub is exposed, look over every lateral in the set rather than only the one that failed. They age together, and a second teardown to change another one is the expensive part of this repair.
| Brand | Pentair |
|---|---|
| Manufacturer part number | 55025800 |
| UPC | 788379678029 |
| Type | Lateral underdrain |
| Part type | Pool filter part |
| Fits | Pentair Meteor and Eclipse 26" sand filters |
| Length | 5 11/16" |
| Diameter | 7/8" |
| Thread | 3/4" MPT |
| Shipping weight | 0.05 lb |
| Ships | Parcel |
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