HARCO 820320 3" Ductile Iron IPS Pipe to Pipe Joint Restraint . Price is for one (1) set including backup ring and two (2) eye bolts with nuts. With the HARCO Valve to Fitting Restraint System you can eliminate concrete thrust blocking of valves. This dramatically speeds the installation and allows for later access to the valve. When the valve is restrained directly to the Tee, simple concrete thrust blocking of the Tee provides for all thrust restraint. Alternatively, joint restraint of the fitting to the pipe can be accomplished with HARCO’s other jont restraint products.