071136Z | Pentair Purex & WhisperFlo Clamp Knob

OEM Pentair Clamp Knob 071136Z is a replacement knob used to secure filter and pump lids on Pentair Purex SM/SMBW 2000 and 4000 series filters and WhisperFlo pumps. Designed for equipment manufactured before 1998, this knob maintains a reliable seal to prevent leaks and preserve system pressure. It ensures proper lid compression to support consistent water flow and filtration performance. Built from durable materials, the knob withstands harsh pool environments, making it an essential component for servicing older Pentair equipment.

Highlights

• Built for Pre-1998 Pentair Units: Specifically made for older WhisperFlo pumps and Purex SM/SMBW filters, including 2000 and 4000 series models.

• Secures System Components: Tightens filter and pump lids to ensure leak-free operation and maintain internal system pressure.

• Reliable Compression Fit: Helps the lid seal hold firmly, preventing bypass flow and contributing to overall system efficiency.

• Made for Harsh Conditions: Manufactured from rugged material designed to resist chlorine, UV exposure, and mechanical wear.

• Extends Equipment Lifespan: Supports continued use of legacy pool systems by restoring original seal performance and safety.

Includes

• (1) Pentair 071136Z Knob

Compatibility

• Pentair Purex SM 2000 Series Filters
• Pentair Purex SMBW 2000 Series Filters
• Pentair Purex SM 4000 Series Filters
• Pentair Purex SMBW 4000 Series Filters
• Pentair WhisperFlo Pumps
• Pentair Nautilus Plus Filters

Additional Info

Need to secure the lid on your older Pentair filter or pump? This section explains how the 071136Z clamp knob works with pre-1998 systems and where to find it locally at Discount Pool Mart.

Installing the 071136Z Clamp Knob

This OEM knob is essential for maintaining a tight seal on older Pentair filters and pumps. It threads easily into place and prevents leaks by keeping the lid firmly secured.

How do I install the 071136Z knob on a Purex SMBW filter?

Can I buy this clamp knob in-store at Discount Pool Mart?

Does the knob need to be hand-tightened only?

Will this part fit a 1995 WhisperFlo pump?

Is it compatible with Nautilus Plus filters too?

Diagnosing Seal and Leak Problems

A cracked or loose knob can compromise the system seal, causing pressure drops or water leaks. Here's how to spot and solve the issue.

Why is my filter lid leaking after startup?

Can a worn clamp knob cause pressure loss in the pump?

Should I replace the knob if it no longer threads tightly?

What’s the risk of running the pump without a secure clamp?

Can I bring the old part in to Discount Pool Mart for a match?

Buying the Clamp Knob In Store

Discount Pool Mart stocks legacy Pentair parts like the 071136Z clamp knob. Shopping in person allows you to verify model fit and get quick install advice.

Where can I walk in and find the 071136Z clamp knob?

Will store staff help confirm it fits my pre-1998 system?

Is this part sold individually or as part of a lid kit?

What other parts should I inspect when replacing this knob?

Can I check the threading match in-store before buying?

Diagram