ONAN 5040327 1 1/4 IN NPT CHECK VALVE Original ONAN/CUMMINS OEM part
ONAN
- Payment Methods
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- SKU:
- ONAN 504-0327
- MPN:
- 504-0327
- Condition:
- New
- Shipping:
- View Shipping Rates

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Description
- Trusted Durability for Every Engine Cycle
- Precision-engineered to maintain flawless backflow control
- Corrosion-resistant design to extend service life
- 100% Genuine ONAN OEM component guaranteeing exact fit and performance
ONAN 504-0327 CHECK VALVE – Power Flow Protection Designed for Your ONAN Generator’s Heartbeat
The ONAN 504-0327 CHECK VALVE plays a critical role in safeguarding your generator’s fuel and oil systems by preventing unwanted backflow, ensuring stable operation under all load conditions. Crafted by ONAN to meet rigorous engineering standards, this OEM part offers unmatched longevity and compatibility. Upgrade or replace now to secure the performance integrity your power system deserves. Harness the legacy of ONAN’s engineering excellence and invest confidently in your equipment’s future.
Features Crafted for Reliability and Peace of Mind
- Precisely calibrated valve mechanism optimizes fluid control ensuring peak engine efficiency
- Timely replacement prevents system failures and costly downtime during critical power demands
- Order your genuine ONAN 504-0327 immediately to maintain uninterrupted generator performance
Details
Product SKU: ONAN 504-0327
Our team is committed to guiding you through every step of your purchase to guarantee the right fit and optimal function for your ONAN generator. Reach out anytime via our help center – we are passionate about helping you achieve the best repair outcome and lasting reliability from your investment.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov