When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
If you mean a small nylon T-piece similar to what you would use to plumb in a boost gauge, you could get them from Demon Tweeks; or easier go to your local Halfords or similar and buy a T-piece for connecting windscreen washer hose. Does the same job.