I am having a return hose problem. New hose from PS repairs - just had pump rebuilt - with new hose and clamp. Appears to be proper type and diameter. Leaks at the bottom clamp by the valve regardless of clamp pressure. Before I take it back to the shop and make them fix it, is there any secret as to hose length or lap length over the steel tube that anyone has found eliminates this problem. Is there a lip on the tube that they may have clamped over? Any advice is appreciated.