Connect a shower hose to a 28mm tap

[Robert1044]

So, I have a tap in my bathroom that has a thread diameter of 28mm. It generally fits the 28mm aerators.

However, I want to attach a shower hose to it, and I searched for days for something that I can screw into that tap, other than an aerator. A BSP 3/4" male thread seemed close enough, so I bought that, but it is still about 1.5mm too narrow.

It drives me crazy that nothing apart from those 28mm aerators would fit it. I am now considering buying this aerator and somehow smashing a 3/4"x1/2" BSP adapter in it.

Please tell me that there is a simple option that I somehow failed to recognise.

 

[Dan Robinson]

1" Bush

 

[Robert1044]

1" Bush

Isn't 1" BSP around 33mm?

 

[Dan Robinson]

No.

 

[OwainDIYer]

http://www.everydropisprecious.com/water-saving-devices/tap-to-shower-kits.html
may have something suitable

If your shower hose can fall below the overflow level of the bath then you'll need to fit a double check valve to prevent back siphonage and possible contamination of the water supply.

 

[Robert1044]

No.

Hm. Well, I just bought 1" male to 1/2" female adaptor and the male is 33mm as I was afraid. I'd really appreciate if you could elaborate your suggestion. As in, which measurement standard the 1" is (BSP I guess) and what actual part of the bush measures 1". The one that had '1"' in its name is quite too big.
Thanks

http://www.everydropisprecious.com/water-saving-devices/tap-to-shower-kits.html
may have something suitable

If your shower hose can fall below the overflow level of the bath then you'll need to fit a double check valve to prevent back siphonage and possible contamination of the water supply.

The reason I don't want to use their option is because it is quite expensive for what its offering. I admit that I have probably spent now an equivalent amount of money on all these numerous adapters, but it becomes a matter of principle now. I can't believe that 28mm tap size fits only 28mm aerators and them alone.
Thanks for pointing that out though.