Best in 7 days
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Ships within 48 hours · Estimated delivery Oct 18 - Oct 23
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Forespar MF 840 Vented Loop - 1-1/2" [903000]MF 840 Vented Loop 1 1 2" Installing one of our vented loops will ensure that fluids will not siphon from tank to tank. Vented loops are commonly used in the marine toilet system and engine cooling system. The simple valve system incorporated in the top of the loop allows air to enter the line when not in use, yet effectively seals as water or other fluid passes through. Molded in Marelon, neither vent nor loop will corrode. The duckbill one way valve
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.0 ★★★★★
Based on 706 reviews
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Product Reviews
★★★★★ 5
Worked perfectly
Size: (Pack of 1)
Easy to install
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
perfect fit
Size: (Pack of 1)
Buy this. 3-minute install. Youtube it.
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Reviewed in the United States on May 8, 2025
★★★★★ 4
Did its job
Size: (Pack of 1)
No complaints and did what it was intended for. Nice fit.
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Reviewed in the United States on September 16, 2024
★★★★★ 5
Excellent Quality
Size: (Pack of 1)
Nice quality.
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Reviewed in the United States on June 7, 2025
★★★★★ 5
Super easy and inexpensive
Size: (Pack of 1)
It was super easy to swap out myself! I just searched “how to change engine air filter 2017 Acura RDX” on YouTube and watched the first video that popped up. It took me longer to type this than it did to change the filter. Plus, this one cost about a third of what Valvoline was going to charge me to replace it.
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Reviewed in the United States on August 10, 2025
