Pentair 4" Flange Assembly Kit W/ Gasket & Stainless Steel Hardware | 357262
Pentair
SKU: 357262
Pentair 4" Flange Kit with Gasket & Stainless Steel Hardware | 357262
The Pentair 357262 is an OEM 4" flange assembly kit used on select Pentair commercial pool and spa pumps. This kit includes the 4" flange, a matching gasket, and stainless steel hardware to help restore a tight, leak-resistant connection at the pump flange during service or replacement.
Key Features
- 4" pump flange kit: replacement flange for large plumbing connections used on commercial/high-flow pump applications.
- Includes gasket: helps renew sealing surfaces for a proper, leak-resistant joint.
- Stainless steel hardware included: corrosion-resistant fasteners for outdoor equipment environments.
- PVC thermoplastic construction: durable material designed for pool/spa plumbing service.
- Socket-style connection: intended for large pipe/flange plumbing assemblies (confirm your pump’s flange style before ordering).
Compatibility
- Pentair Aurora 340/410 series pool & spa pumps
- Pentair EQ Series commercial plastic pool & spa pumps
- Pentair C-Series commercial bronze pool & spa pumps
- Pentair CSP / CCSP / 5CSP / 5CCSP series commercial pumps
Tip: Flange styles and sizes can vary by pump model and revision. Match your pump model and parts diagram to confirm 357262 is the correct 4" flange kit.
What’s Included
- (1) 4" Flange
- (1) Gasket
- Stainless steel hardware (fasteners as supplied with the kit)
Common Reasons to Replace
- Seepage or leaking at the flange connection
- Cracked, warped, or damaged flange after service or freeze stress
- Hardware is corroded, stripped, or missing
- Rebuilding a pump wet end and replacing seals/gaskets for reliable operation
Installation Notes
- Turn off power to the pump and relieve system pressure before disassembly.
- Clean mating surfaces thoroughly; debris or scale can prevent a proper seal.
- Tighten hardware evenly in a cross-pattern to help the gasket seat uniformly.
- Do not over-tighten—excessive torque can distort the flange and create leaks.
- After restart, inspect the flange area closely for drips during operation.
Related Products
- Pentair EQ Series pump parts
- Pentair Aurora 340/410 pump parts
- Pentair C-Series commercial pump parts
- Pentair CSP/CCSP commercial pump parts
- Pool pump gaskets
- Stainless steel pump hardware
- PVC primer & cement
Maintenance Tips
- Periodically inspect large flange connections for salt/scale trails or dampness—small leaks are easier to fix early.
- Keep water chemistry balanced to reduce scaling that can build up on sealing surfaces.
- If you open the flange for service, replace the gasket rather than reusing a flattened or torn seal.
- Support nearby plumbing to reduce vibration and stress on the flange connection.
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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