HotSprings Sovereign - Hose/Fixture Question

[esr.mich]

Hello all!

I’ve got an older (~2000) Watkins/Hotsprings Sovereign hot tub… the jets have not been as strong as the used to be - so after some digging, I decided to replace the pump.. still not resolved.  Happened to look into the pump cabinet area and noticed a lot of water - and tracked it to the black fitting in the picture… the small barb on the one end seems like it broke off and is in the dangling small tube shown.  If I put my thumb over the small tube, I could tell the jets started working stronger and the pump stopped surging.  Any idea what this is called and where I can get a replacement?

 

Many thanks in advance!

[esr.mich]

For some additional clarification… this fitting is tucked up behind the circuit board panel/box, above the heater and jet pump motor housing… the actual pic from inside is below:

[esr.mich]

Still trying to get this sorted out.... here is a picture of just the fitting I'm trying to find.  I thought it was just a 90 bend with a fitting for the 1/4 inch line - but there is definitely a valve inside.

The valve part seems to either block the 1/4 fitting (which is the broken part) or allow it flow (wherever that hose goes that is).

 

I'm half thinking about finding an 1/2 or 3/4 adapter with a barbed fitting like the one below

Basically cut off the bigger threaded part and epoxy the flat bolt head remainder to the valve end so I can put the hose back on and just re-use this part.

Unless someone knows what this is and where I can find one.

Thanks!