Pentair Lateral Assembly 25" Filter | 24901-0003
Pentair
SKU: 24901-0003
Pentair / Sta-Rite 24901-0003 Lateral Assembly for System:3 Sand Filter (S8S70)
The Pentair / Sta-Rite 24901-0003 is an OEM replacement lateral assembly used inside the Sta-Rite System:3 SS-Series sand filter model S8S70. Laterals distribute water evenly through the sand bed during filtration and collect water during backwash. Replacing cracked or broken laterals helps restore proper flow and prevents sand from returning to the pool.
Compatibility
- Fits: Sta-Rite System:3 SS-Series sand filter S8S70
- Typical quantity used: 16 laterals per filter (verify on your parts diagram)
Key Details
- Part number: 24901-0003
- Type: Sand filter lateral
- Approx. size: 6-1/4" long x 1-1/4" high x 1-1/4" wide
What This Part Does
- Supports even water distribution through the sand bed for consistent filtration
- Helps prevent channeling in the sand and improves overall filter performance
- Reduces the chance of sand blowing back to the pool when laterals are intact and properly seated
Common Signs You Need New Laterals
- Sand returning to the pool through the return jets
- Cracked, split, or missing lateral “fingers” found during service
- Uneven filtration performance or abnormal pressure/flow after ruling out pump and plumbing issues
Installation Notes
- Shut off the pump and relieve all pressure before opening the filter.
- Lower the water level in the tank and remove sand as needed to access the lateral hub/manifold.
- Replace any damaged laterals and inspect the hub/manifold for cracks or worn threads.
- Hand-tighten laterals snugly—avoid over-tightening plastic threads.
- When refilling, add water first before adding sand to help cushion laterals and reduce breakage risk.
- After reassembly, rinse/backwash per your normal start-up procedure and confirm no sand returns to the pool.
Related Products (Aqua Pool Supply)
- Pentair / Sta-Rite 24901-0003 Lateral (Search)
- System:3 S8S70 Filter Parts (Search)
- Pool Filter Sand (Search)
- Sand Filter Multiport Valve Gaskets (Search)
- Pool-Safe Silicone O-Ring Lubricant (Search)
Maintenance Tips
- Never change multiport valve positions with the pump running—this helps protect laterals and internal valve seals.
- Backwash when filter pressure rises about 8–10 PSI over your clean starting pressure.
- If sand returns after a proper backwash/rinse, inspect laterals and the standpipe/hub for damage.
- Keep water chemistry balanced—extreme pH and high calcium can shorten the life of plastic internals over time.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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