Pentair Chlorinator Strainer Screen | 210396Z
Pentair
SKU: 210396Z
Pentair 210396Z Inline Chlorinator Check Valve Screen (Strainer Screen) for Rainbow 320 / 320C / 322
The Pentair 210396Z is an OEM internal strainer screen used in select Pentair Rainbow inline/offline chlorinators. It sits at the check valve area to help catch debris before it can clog or block the check valve at the bottom of the chlorinator, supporting consistent chlorine feed and smoother operation.
Common Compatibility
- Pentair Rainbow automatic chlorinators: 320, 320C, 322
- Used as the internal screen at/near the chlorinator check valve area
Replaces / Cross References
- Often referenced as replacing older part numbers such as 210396 and R172255 (depending on listing and revision)
What This Part Does
- Helps prevent debris from reaching the chlorinator check valve
- Reduces the chance of restricted flow through the feeder
- Helps maintain more consistent chlorine delivery when the feeder is operating normally
When to Replace
- Screen is torn, cracked, or deformed
- Repeated clogging that does not clean up well
- Feeder flow issues traced to blockage at the check valve area
- During a chlorinator rebuild/refresh service
Installation Notes
- Turn off the pump and relieve pressure before opening the chlorinator.
- Remove the old screen and clean out any debris or scale in the check valve area.
- Reinstall the new screen in the same orientation as the original.
- After reassembly, restart the system and confirm normal feeder operation (no leaks, normal flow/pressure).
Related Products (Aqua Pool Supply)
- Pentair Rainbow 320/320C Parts (Search)
- Pentair Rainbow 322 Parts (Search)
- Chlorinator Check Valve Parts (Search)
- Chlorinator O-Rings & Gaskets (Search)
- Pool-Safe Silicone Lubricant (Search)
Maintenance Tips
- Inspect and rinse the screen during routine feeder service to reduce buildup and clogging.
- Keep tablets and feeder components dry when not in use, and clear out small debris before reloading.
- If chlorine feed becomes inconsistent, check for restrictions at the screen/check valve area and clean as needed.
- Replace worn feeder O-rings during service to prevent air leaks and seepage around the lid and fittings.
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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