1) The photo of the 1/2" Filter Housing Couplings shows o-rings fitted but none was delivered (with my first delivery) 2) The 10" filter house comes with unthreaded holes for the bracket bolts. I had to make the threads myself. 3) There is no measurements given for the length of LDPE water pipe/tubing, only a picture of a whole roll. So that's what you expect to get, not 1 meter. 4) Many of the threaded fittings are neither BSPP or BSPT and therefore useless: they either must have a groove/neck for the o-ring (BSPP) or be tapered (BSPT). Typical example is the elbow 3/8" to 1/2". 5) There is a difference between prices and availability on ebay and your own website. As a result I've had to order from both sites simultaneously. It would be better to get everything in one package. Conclusion: the overall quality of the products is low or lacking. Many of the threaded fittings are of an unknown and highly undesirable type. I ended up spending more than 100 pounds rectifing the above problems.