Parts Needed to Connect Two Propane Tanks to a Motorhome's Onboard Propane Tank

Updated 09/12/2026 | Published 09/07/2026

Products Featured in This Question

MEC Stay-Longer RV Propane Adapter Tee - POL x 1"-20 x 1/4" Inverted Flare

$82.91

Thread Sealant Tape for Gas Lines

(88)

$13.80

JR Products Compact Automatic Changeover 2-Stage Propane Regulator

(253)

$73.23

MB Sturgis Propane Adapter Fitting - 3/8" Male Flare x 1/4" Male NPT - Qty 1

(243)

$14.60

MEC RV Propane Pigtail Hoses - ACME Nut x 1/4" Male Inverted Flare - 15" - Qty 2

(1)

$46.94

MEC RV Propane Pigtail Hoses - ACME Nut x 1/4" Male Inverted Flare - 24" - Qty 2

(1)

$49.53

MEC RV Propane Trunk Line Hose - 3/8" Male NPT x 3/8" Female Flare Swivel - 20' Long

$117.92

Question:

I’m looking to mount 2 propane tanks onto the back bumper of my 2020 Jayco Greyhawk motorhome. Add the connection swap over valves and extension hose or piping to the onboard propane tank with an interconnecting “t” connector. Can you help with everything I would need?

asked by: Dave S

Expert Reply:

I sure can Dave! To connect two additional propane tanks to your Greyhawk motorhome you will need the following parts:

JR Products Compact Automatic Changeover 2-Stage Propane Regulator item # 37207-31525

MEC RV Propane Pigtail Hoses 15" Long - Qty 2 item # MEC26TR or item # MEC35TR for 24" Long hoses

MEC Stay-Longer RV Propane Adapter Tee item # MEC67AR

MEC RV Propane Trunk Line Hose - 3/8" Male NPT x 3/8" Female Flare Swivel - 20' Long item # MEC78UR

MB Sturgis Propane Adapter Fitting - 3/8" Male Flare x 1/4" Male NPT item # MBS77FR

Thread Sealant Tape for Gas Lines item # 37207-30025

Do you do quite a bit of boondocking? What has you adding a couple of propane tanks to your motorhome? Feel free to answer this and throw in any other questions you have, where it says Add Comment.