LEAKING HOSE TO PEX FITTING --use this correct adapter

[Rabbit]

Looks like you have done lots of work on this subject, but I was wondering why the cinch rings you linked are more effective than standard 1/2" ones:

https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1

The problem with std 1/2 clamps is they don’t clamp down hard enough on soft braided hose, so they can leak. Apparently Kevin2282 experimented to find an optimally dimensioned metric clamp. You may notice they are called “beverage clamps.” That’s because beverage dispensing systems use braided plastic hoses extensively.

[Gronk1]

Haven’t even taken possession of our Reflection and I feel I should put a kit together after reading this and other threads. Input is welcome and this would be emergency use type stuff.

I have had my Solitude for going on 5 years now and have yet to have a hose or hose fitting leak. I have had the filter on water pump leak, and the pump itself leak.
That being said, I carry two 6' lengths of pex pipe, crimp tool, cutting tool, elbows, unions, t's, plugs, water heater check valve etc. Don't use plastic fittings, get brass ones.
Water alarms under the Nautilus panel/water pump(how I found my leaks), water heater, shower pan, both bathroom & kitchen sinks.
https://www.amazon.com/Instapark-Lea...%2C254&sr=8-37

[Kanadakid]

These are some of the things I keep in my RV Plumbing repair box.

In addition to items below I keep a blue and a red length of 1/2” pex in the basement. I bought 6 foot lengths of each from Home Depot.

I just ordered the clamps Kevin linked to on eBay for the soft hose connection to the PB to Pex adaptors. https://www.ebay.com/itm/23377638376...Bk9SR4CJkMSqYQ

But I’m obsessive.


https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1

https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/Water-Armor-L...dp/B07SBGKP5G/

Good stuff Jerry.......Kid

[Kevin2282]

Looks like you have done lots of work on this subject, but I was wondering why the cinch rings you linked are more effective than standard 1/2" ones:

https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1

Comment Note: This only applied to the flex hoses used in my 2019 Reflection, your hoses might be different.

The standard 1/2" (17mm/17.5mm) cinch rings would not fit over the flex hose with the PB end inserted. Using two 18.5 rings allowed me to get full compression on the rings over all of the ribs on the PB end for a completely watertight connection. I tried several sizes and the 18.5mm worked the best.

[dryfly]

Comment Note: This only applied to the flex hoses used in my 2019 Reflection, your hoses might be different.

The standard 1/2" (17mm/17.5mm) cinch rings would not fit over the flex hose with the PB end inserted. Using two 18.5 rings allowed me to get full compression on the rings over all of the ribs on the PB end for a completely watertight connection. I tried several sizes and the 18.5mm worked the best.

I now realize that I missed that you were referring to using them only on the flex hose. That makes good sense, as the factory uses the standard 1/2" rings and that's where the leaks are occurring. Thanks for your input.

Earlier in the thread @FlyStar mentioned using regular screw type hose clamps with the flex hose and adapter fittings. Did you try any of these before going with the 18.5mm cinch rings?

[Kevin2282]

Earlier in the thread @FlyStar mentioned using regular screw type hose clamps with the flex hose and adapter fittings. Did you try any of these before going with the 18.5mm cinch rings?

I had thought about it, but as an engineer I am a little OCD about doing it the best way that I can. The PEX cinch rings provide a consistent clamping all the way round the barrel of the clamp. A screw type hose clamp is a little more inconsistent but would probably work just fine. Also, the 18.5mm Oetiker beverage chinch clamp were just wide enough that by using two I could effectively use all of the contact surface of the PB adapter to clamp against. This added a little bit of insurance against leaks.

[Rabbit]

I had thought about it, but as an engineer I am a little OCD about doing it the best way that I can. The PEX cinch rings provide a consistent clamping all the way round the barrel of the clamp. A screw type hose clamp is a little more inconsistent but would probably work just fine. Also, the 18.5mm Oetiker beverage chinch clamp were just wide enough that by using two I could effectively use all of the contact surface of the PB adapter to clamp against. This added a little bit of insurance against leaks.

Very good point about screw type clamps. One of the problems with braided hose is it’s so soft, the material “flows” over time to fill voids. Screw clamps have small open voids on each side of the screw holder where the plastic hose can open small channels for potential leaks. But using screw clamps on properly sized barb fittings has the benefit of the sharper tighter fitting barbs preventing the channels from forming.

As in all these related discussions, it comes down to using connections that are matched to the pipe/tubing. Not all fittings you can get onto or into a tube/pipe will be reliable over time.

[Indy Tim]

Comment Note: This only applied to the flex hoses used in my 2019 Reflection, your hoses might be different.

The standard 1/2" (17mm/17.5mm) cinch rings would not fit over the flex hose with the PB end inserted. Using two 18.5 rings allowed me to get full compression on the rings over all of the ribs on the PB end for a completely watertight connection. I tried several sizes and the 18.5mm worked the best.

Are the connections still working out?

[Kevin2282]

Are the connections still working out?

Hi Tim,

Yes, the PB adapter with two 18.5mm Oetiker still works great. I have not had any of the PB transitions from PEX to flex hose leak. I set my pressure regulator at 60psi and everything is good.

These are the 18.5mm Oetiker beverage rings that I used:

https://www.ebay.com/itm/233776375434

[WhittleBurner]

When replacing the sft hose with pex. It is recommended to use the soft hose at the water pump. The pex with as stiff as it is could vibrate making noise you would be able to hear.