Respond to these showcases www. ajplus. co. uk/ajdirect Readers may obtain information about these products by filling in the enquiry numbers on an AJ enquiry card. Advertisers wishing to promote their products on these pages should Speedfit pipes are now offered in polybutylene for plumbing and heating. The material is light and easy to handle and cut, with a smooth bore preventing scale build-up. An inner barrier prevents air ingress which could corrode metal components.