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Size of Propane Hose to Go From Tank to Regulator on RV  

Question:

I measured it. it is a 3/8 inch.

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Expert Reply:

Most regulators like the part # CAM59005 have an inlet of 1/4 inch SAE and an outlet of 3/8 NPT.

It would be out of the ordinary if your tank to regulator wasn't 1/4 inch SAE inverted flare. Part # CAM59053 has this style of fittings on both sides. Part # 100040-144-MBS has 3/8 inch on the other hand.

Heres how you tell difference between 3/8 NPT and 1/4 NPT. The difference is the outside diameter.

1/4 inch is .540 outside diameter on the threads and 3/8 inch is .675 inch.

expert reply by:
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Jameson C
David profile picture

David

10/3/2017

I measured it. it is a 3/8 inch.

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JamesonC profile picture

Jameson C.

10/3/2017

Since you have 3/8 inch you'd want the part # 100040-144-MBS which has the 3/8 inch fitting size. Price is down below.
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