IMPERIAL FITTINGS The John Guest Speedfit range of push-fit fittings have been designed for a wide range of industrial applications. < Speedfit Fittings, Valves & Tubing PRODUCT CATEGORIES Grey Acetal Fittings – PI White Acetal Fittings – CI Polypropylene Fittings – PP Superseal Fittings – SM / SI Brass Fittings – MICheck out the products from family of brands