Hayward Sand Filter O-Ring | SX200Z7
Hayward Products
SKU: SX200Z7
Hayward SX200Z7 Filter Tank O-Ring (S200 Series / 20" Tank)
Hayward SX200Z7 is a genuine replacement filter tank O-ring for select Hayward sand filters, most commonly the Hayward S200 Series 20" tank. This large tank seal sits between the filter tank and the upper tank/valve assembly to help prevent water leaks and air intrusion.
Key Features
- Part Number: SX200Z7
- Brand: Hayward
- Type: Filter tank O-ring / tank seal
- Common Fit: Hayward S200 Series sand filter (20" tank)
- Helps stop leaks at the tank-to-top seam and supports proper filter pressure
- Often referenced as O-103 size for this application
Common Compatibility (Verify Your Model)
- Hayward S200 Series sand filters (20" tank)
- Also commonly referenced as fitting SwimQuip/Sta-Rite equivalents such as DEP-36 / HRP20 (model dependent)
Approximate Dimensions (Helpful for Verification)
- Inside Diameter: approx. 19-3/8"
- Outside Diameter: approx. 20"
- Cross Section: approx. 5/16"
Common Symptoms This Part Can Fix
- Water leaking from the tank seam where the top/valve meets the tank
- Air entering the system (bubbles at returns) after filter service
- O-ring looks flattened, cracked, sticky, or brittle
Installation Notes
- Shut off the pump and relieve filter pressure completely before opening the filter.
- Clean the O-ring groove and both sealing surfaces thoroughly (remove sand/grit).
- Apply a light coat of pool-safe silicone O-ring lubricant for easier seating and better sealing.
- Make sure the O-ring is not twisted or pinched before tightening the clamp/fasteners.
Related Products
- Hayward SX200Z7 Tank O-Ring
- Hayward S200 Sand Filter Parts
- Pool Filter Tank O-Rings
- Pool-Safe Silicone O-Ring Lubricant
- Hayward Sand Filter Clamp & Hardware
Maintenance Tips
- Inspect the tank O-ring any time the filter is opened; replace if it’s flattened, cracked, or no longer pliable.
- Keep sealing surfaces clean—sand or debris in the groove is a common cause of seam leaks.
- Use only silicone-based pool lubricants (avoid petroleum-based products on pool O-rings).
- After reassembly, restart the system and check for leaks once normal operating pressure is reached.
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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