Forespar MF 839 Vented Loop - 1-1/ 4"
SKU: 97866799036

Forespar MF 839 Vented Loop - 1-1/ 4"

Sale price$41.02 Regular price$45.58
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

Forespar MF 839 Vented Loop - 1-1/ 4"MF 839 Vented Loop 1 1 4" 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

MF 839 Vented Loop - 1-1/4"

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 is designed to seal properly if particulate matter is present in fluids. 

Specifications:

  • Barb Size: 1-1/4" (28.57mm)
  • Height: 7" (177.8mm)
  • Width: 9" (228.6mm)

Manufacturer Part Numbers: 903011
GRP:WRO
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 97866799036

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redbird_54
Louisville, US
★★★★★ 5
Oxidation removal
Has worked great at removing the oxidation from our RV.
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Reviewed in the United States on May 28, 2026
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Magen N
Battle Creek, US
★★★★★ 5
Great for RV and boat
This stuff is amazing! My husband uses this on the boat and RV. Our RV is orange and was heavy oxidized. This brought the color back!
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Reviewed in the United States on November 3, 2025
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Richard W. Mooney
Houston, US
★★★★★ 5
Easy to use..great results!
This product actually delivers on its promises! It took of years worth of road film and grime from our motorhome..leaving a clean base for the application of Poli Glow polish... Our motorhome is now looking shiney and new again. Very easy to use..just mop it on..let set for a few minutes then pressure wash off.
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Reviewed in the United States on November 4, 2025
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Patrick J Butler
Phoenix, US
★★★★★ 5
Great product
Amazing product
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Reviewed in the United States on June 9, 2026
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Kay Rhodus
Dallas, US
★★★★★ 1
The product downer live up to the advertised claim
Washed a side by side section of my 2022 rv with poli prep and simple green. The comparison was tragic. Simple green definitely is a superior product. Don't waste your money.
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Reviewed in the United States on August 19, 2025

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