Pentair Sta-Rite 24851-9001 Upper Tank Half Kit (25") for System:3 | 24851-9001
Pentair
SKU: 24851-9001
Pentair / Sta-Rite 24851-9001 Upper Tank Half Kit (25") for System:3 Filters
The Pentair / Sta-Rite 24851-9001 is the OEM upper tank half (tank top / lid) kit used on select Sta-Rite System:3 filter systems with a 25-inch tank. This part replaces the top half of the filter housing when the original is cracked, warped, leaking, or the clamp interface is damaged. It is commonly supplied as a kit and is often listed as including the factory decals/labels.
Common Compatibility (Verify Your Filter Model)
- Sta-Rite System:3 Modular Media: S8M150, S8M500
- Sta-Rite System:3 Modular D.E.: S8D110 (select configurations)
- Sta-Rite System:3 High-Rate Sand: S7S70 (select configurations)
System:3 parts can vary by series (SM/SD/SS) and tank size. Confirm your exact filter model and parts diagram before ordering.
Key Details
- Part number: 24851-9001
- Part type: Upper tank half / tank top (lid) kit
- Tank size: 25" System:3 tank
- Typical use: Replaces the upper shell when the tank top is damaged or leaking
When to Replace the Upper Tank Half
- Hairline cracks, stress fractures, or seepage from the tank top
- Warping or deformation that prevents the tank O-ring from sealing
- Damage at the clamp/locking-ring interface that prevents safe, even clamping
- Repeated leaks after replacing the tank O-ring and confirming clean, undamaged sealing surfaces
Installation Notes
- Turn off the pump and relieve all pressure from the filter before opening.
- Inspect the tank O-ring and replace it if flattened, cracked, swollen, or nicked.
- Clean sealing surfaces thoroughly; debris or scale can cause leaks even with new parts.
- Reassemble and tighten the clamp evenly per the manufacturer’s procedure (do not over-tighten).
- Restart the system and check for slow seepage after the filter reaches full operating pressure.
Related Products (Aqua Pool Supply)
- 24851-9001 Upper Tank Half (Search)
- System:3 Tank O-Ring / Seal (Search)
- S8M150 Cartridge Modules (Search)
- S8M500 Cartridge Modules (Search)
- Pool-Safe Silicone O-Ring Lubricant (Search)
Maintenance Tips
- Keep the tank O-ring clean and lightly lubricated with pool-safe silicone lubricant to reduce pinching and leaks.
- Never open the filter until pressure is fully relieved—this protects equipment and prevents damage to sealing surfaces.
- If the filter is in direct sun, provide shade when possible to help extend plastic tank life.
- Record your clean starting pressure after service; a rising baseline can indicate restriction or system changes.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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