HydroAir - Hex Coupler for HydroAir Wall Fitting Assemblies - 30-4312

HydroAir – Hex Coupler for HydroAir Wall Fitting Assemblies

The HydroAir hex coupler, part number 30-4312, is a small replacement part for the HydroAir concrete spa jet system. It is used to extend the injection tube inside a HydroAir wall fitting assembly. It is a single coupler rather than a complete fitting, so it suits owners who only need to replace this one component.

Compatibility with HydroAir concrete spa jets

This hexagonal coupling belongs to the HydroAir concrete spa jet system. Its job is to extend the injection tube inside the wall fitting assembly, so it is the part to look at when you are working on the internal components of a HydroAir wall fitting.

The coupler is listed under the Balboa / HydroAir part number 30-4312. It is intended for HydroAir concrete spa jet systems, so check that your installation is of this type before you order it for any other kind of jet.

Dimensions of the 30-4312 hex coupler

The manufacturer data gives the following measurements:

• Height: 25 mm
• Outside diameter: 24.5 mm
• Inside diameter: 13 mm

These values make it easy to compare the replacement with the coupler you are removing. Measure your old part carefully and check that the height and both diameters match before you order.

How to choose the right replacement part

Start with the part number. If you have a parts list, a parts diagram or a note from an earlier repair, look for the number 30-4312 or for a HydroAir hex coupler used with the injection tube in the wall fitting assembly.

Then confirm the basics:

• Your spa is a HydroAir concrete spa jet system.
• The part you are replacing is a hex coupler on the injection tube inside the wall fitting assembly.
• The height, outside diameter and inside diameter match the figures above.

If your old coupler is missing or damaged and cannot be measured, rely on the part number and on the position of the part within the fitting.

Ordering notes

This page covers the hex coupler only. It is a spare part for an existing HydroAir wall fitting assembly and is not a complete jet or a complete fitting. If other components of the assembly are also worn, they need to be identified and ordered separately.

No user guide or technical documentation is listed for this part, so the part number and the dimensions above are the main references for choosing the correct replacement.