Pentair Pentek 151120 OR-34 #241 Buna-N O-Ring
Pentair Pentek 151120 OR-34 #241 Buna-N O-Ring
Replace a worn or damaged housing seal with the genuine Pentair Pentek 151120 OR-34 O-ring. Made from durable FDA-grade Buna-N rubber, this #241 O-ring fits compatible Pentek Traditional Standard, 3G Standard and Valve-In-Head filter housings with 3/4-inch ports.
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Features & Details
The Pentair Pentek 151120 OR-34 O-ring provides a watertight seal between the cap and sump of compatible filter housings. Constructed from flexible, abrasion-resistant FDA-grade Buna-N rubber, it is an essential replacement for an O-ring that has become flattened, cracked, stretched or damaged.
Product specifications
- Pentair part number: 151120
- Also known as: OR-34 and #241
- Material: FDA-grade Buna-N nitrile rubber
- Compatibility: Select Pentek Traditional Standard, 3G Standard and Valve-In-Head housings with 3/4-inch inlet and outlet ports
- Housing sizes: Compatible #10, #12 and #20 Standard housings
- Approximate dimensions: 3.86-inch inside diameter × 4.14-inch outside diameter
- Cross-section: Approximately 0.139 inch
Maintenance tips
Inspect the O-ring for cracks, tears, stretching or flat spots whenever the filter cartridge is replaced. Before installation, clean the O-ring groove and apply a light coating of food-grade silicone lubricant. Make sure the O-ring is seated evenly and is not twisted or pinched.
Tighten the housing sump only until it is securely sealed. Over-tightening can damage the O-ring or make the housing difficult to open during the next filter change.
Important: Confirm the housing model or existing O-ring part number before ordering. This O-ring is not designed for Big Blue filter housings.

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FAQs
How do I cancel or edit an order?
How do I cancel or edit an order?
Unfortunately, we cannot cancel orders due to a change of mind. However, we understand that mistakes happen. If you need to edit your order information, such as the delivery address or contact number, please contact our customer service as soon as possible.
Here’s what you can do:
- Contact our customer service via email address, or Live Chat.
- Have your order number ready when contacting customer service.
- We cannot guarantee changes to orders after 24 hours of placement. This is because orders may be processed once received
How can I track my order?
How can I track my order?
You can track your order by checking the shipping confirmation email, which contains a tracking number and a link to the courier's website. Alternatively, log in to your account on our website, navigate to "My Orders," and click on the tracking link provided for your order.
What if there is a problem with my order?
What if there is a problem with my order?
If there is an issue with your order, please contact our customer service team as soon as possible. You can reach us via email, phone, or through the contact form on our website. Provide your order number and a brief description of the problem so we can assist you quickly.
I didn't receive all off my order?
I didn't receive all off my order?
If part of your order is missing, please check the shipping confirmation email to see if the items were sent separately. If all items should have arrived together or if you have concerns, contact our customer service team with your order number. We’ll investigate and resolve the issue promptly.

