Overview Reviews Product Description The GPI rebuild kit for HP-100 hand pump (#114505-2) helps keep the GPI HP-100 hand pump going as long as possible. The kit includes a piston ring, three seals, packing seals, mylar film, and a liner. GPI Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × GPI HP-100 Hand Pump Rebuild Kit 114505-2 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *