


Ensure a watertight seal and optimal performance for your pool or spa system with the genuine Jandy MHP & MHPU Diffuser O-Ring. This critical replacement part, size -330 (Part R0338801), is specifically designed to fit Jandy MHP and MHPU series equipment, preventing leaks and maintaining crucial system pressure. Trust in genuine Jandy parts to keep your aquatic environment running smoothly and efficiently.
First, turn off all power to the pump and close any necessary valves. Drain water from the pump housing. Locate and carefully remove the diffuser. Remove the old O-ring, clean the groove. Apply O-ring lubricant to the new R0338801 O-ring, then install it. Reassemble the diffuser and pump, then restart the system, checking for leaks.
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Free standard shipping on all orders
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Ensure a watertight seal and optimal performance for your pool or spa system with the genuine Jandy MHP & MHPU Diffuser O-Ring. This critical replacement part, size -330 (Part R0338801), is specifically designed to fit Jandy MHP and MHPU series equipment, preventing leaks and maintaining crucial system pressure. Trust in genuine Jandy parts to keep your aquatic environment running smoothly and efficiently.
First, turn off all power to the pump and close any necessary valves. Drain water from the pump housing. Locate and carefully remove the diffuser. Remove the old O-ring, clean the groove. Apply O-ring lubricant to the new R0338801 O-ring, then install it. Reassemble the diffuser and pump, then restart the system, checking for leaks.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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