TheSamba.com :: View topic - Need help sourcing T barbed fitting for dual MC to single res

Tue Nov 12, 2024 1:03 pm

Hi there everyone,

I've got a 59 that's using the later dual circuit MC and I'm wanting to keep my single line reservoir. When I bought the car, it had the blue braided lines with a barbed T(if I remember correctly) but that setup is long gone. I've found the blue braided 7mm line but I'm having problems finding a suitable T or Y to make the adaptation work.

Can anyone point me in the right direction or a search term to get better results?

Thanks for your time!

Tue Nov 12, 2024 1:19 pm

Y
https://www.amazon.com/Aexit-Brass-Fittings-Shaped-Connector/dp/B07HQ6FCF4

T
https://socalautoparts.com/product/fuel-line-t-7mm-brass/

Tue Nov 12, 2024 11:19 pm

Place the Y or T fitting as far away from the master as possible, close to reservoir. That way you will retain more fluid in each circuit's individual hose. The fluid stored in the hose will serve as a sort of reservoir so that you maintain fluid in one circuit if the other circuit leaks and drains the single reservoir, thus maintaining the redundancy of the dual circuit system. If the fitting is placed right up close to the master, the effectiveness of redundancy is diminished.

Now stop it!!!!

Have fun. :D

Wed Nov 13, 2024 3:24 pm

Thank you both very much for your help, I greatly appreciate it!

I ordered some Ts and will do as suggested to maximize reserve fluid, I honestly would have never thought of it, the T was going to go near the MC.

Fri Nov 15, 2024 12:02 pm

On my 56 I wanted to keep the stock reservoir also with my dual master but I just kept it for looks and went this route.
pic found in the gallery.

Fri Nov 15, 2024 12:14 pm

Do to road splash getting into the vent hole, dirt, difficulty in checking fluid level and reservoir flushing, I find placing the reservoir on the master as not a good option. Placed in the trunk negates all these problems.

Fri Nov 15, 2024 12:38 pm

I used that setup when testing the brakes on the pan but same as above, I don't want to leave the reservoir in that space permanently.

Fri Nov 15, 2024 6:47 pm

I've thought myself into a conundrum. The ports on the mc and the corresponding blue braided line is about 7mm. The single port reservoir is decidedly smaller. Is there some sort of rubber reducer I could use to pair the hose to the reservoir?

Fri Nov 15, 2024 7:16 pm

schwim wrote: I've thought myself into a conundrum. The ports on the mc and the corresponding blue braided line is about 7mm. The single port reservoir is decidedly smaller. Is there some sort of rubber reducer I could use to pair the hose to the reservoir?

I forget what the actual sizes are, but you can measure and try something like this..

https://www.walmart.com/ip/Unique-Bargains-2Pcs-8m...lsrc=3p.ds

this says it is an 8mm to 6 mm barbed coupling.

I am not sure if this is the size you need, if not, there should be one that does fit. Some ACE hardware stores have a good selection of doodads like this. Also try autoparts stores.

OR you MIGHT get away with a really tight hose clamp. just needs to be leak free, it aint high pressure

or build an adaptor out of two different sized barb to threaded connectors, with a threaded union in between
Here is a selection of different barb to thread fitting, buy the two sizes you need, then buy a threaded union to put the two together. use pipe tape on the threads!!!...
https://www.ebay.com/itm/146109131922?_skw=7+mm+to...5053732223

Tue Dec 10, 2024 3:51 pm

schwim wrote: I've thought myself into a conundrum. The ports on the mc and the corresponding blue braided line is about 7mm. The single port reservoir is decidedly smaller. Is there some sort of rubber reducer I could use to pair the hose to the reservoir?

Regarding reducers, have a look at page 2 of this thread: https://www.thesamba.com/vw/forum/viewtopic.php?p=10316661&highlight=#10316661

I'd consider using the dual chamber '67 reservoir to get redundancy all the way through the system. It's longer than the single chamber, but fits reasonably well in the same area. The strap is made from a large s/s jubilee clip.