Polypipe PVC Double Socket 160mm, Polypipe's below ground range of drainage carry all the approvals and accreditations needed and offer strength and flexibility making them a great alternative to clay drainage and concrete drainage.
Price: £24.22 from Plumbing Place
This is a Vitrified Clay Pipe Adaptor PVC Socket 160mm made by Polypipe
This is a Double Socket Underground Coupler with a diameter of 160mm made by Polypipe.