Our John Guest Style Push-fit Fittings and related products are specifically designed and manufactured to our speficitaions. All John Guest Style fittings and related products should be selected, installed, used and maintained in accordance with these Specifications. It is the customer’s/user’s responsibility to ensure that the push-fit fittings and related products are suitable for their intended applications, are properly installed and maintained and are used in accordance with the Technical Specifications. It is also the customer’s/user’s responsibility to provide its own customers with all relevant technical information about these products it supplies them. If you have any questions about our technical specifications, please contact us.