About Us... Welcome to Petes Plumbing Supplies Ltd. We are an experienced Builders Merchants based in Manchester. Our friendly staff are available and ready to answer any questions you may have around your Builders Merchants needs. Petes Plumbing Supplies Ltd are sure we can meet your needs, so telephone or email now. We'd like to know how you found us, so please let us know the name of this site when you get in touch.