Space saving basin trap

[mitchino]

I'm fitting a countertop basin and want to use the shallowest trap I can. I found a product called Uniwaste Waterless Trap which would be ideal:

Unitrap Waterless Waste Trap Ideal Under Baths & Basins Adapts From 40mm - 32mm

Buy the Unitrap Waterless Waste Trap Ideal Under Baths & Basins Adapts From 40mm - 32mm online at Trade Supplies Online. FREE Delivery on orders over £50. Join our Facebook page for exclusive discounts.

www.tradesuppliesonline.com

Anyone used one of these? Are they ok?

Is there a reason I can't use a McAlpine bath trap:

https://www.NoLinkingToThis/p/mcalpine-bath-trap-white-40mm/84362

Are there any other options that would work?

 

[exedon2]

The waterless trap of any type would be fine
If basin waste pipe is connected into soil pipe (single stack) bath trap is a no against regs and high probability of smell come in.
If waste is into a gulley or hopper head bath trap would work just looks wrong.

 

[WC1]

The unitraps eventually fail - the silicone flap stops working but they are very easy to replace.
I think they are just about the smallest traps useable.