PM0408S 5/16" X 5/16" water pipe connector. The connector/joiner will extend or repair a 5/16" water filter pipe, with an easy push-fit connection. Also Suitable for foodstuffs, potable liquids, air and inert gases. Commonly used for extending water pipes for fridges with water filters. A general knowledge of plumbing skills is all you need to fit this product. However, if you are at all unsure then please consult a plumber.
eBay