Ok guys. I have 3 story building I do service for. They have 4 condos per floor. the boiler is located just about 15' from the one side and the recirc. runs about 15' to the one end and ties into the riser on the first floor just above ground level feeding the hot for the kitchens. They have had a few pin holes in the copper line under the slab. I got them to let me replace the hot and the recirc on that run. they still have about 50' going to the other side and i am assuming it connects at the base of the hot riser on the end units kitchen. its piped in 1/2" copper about 30-40 years old and I told them its only a matter of time before they get a leak over there. they have that recirc running on a B&G 1/12 hp series 100 pump. doesn't that seem like a bit much? do you think going with a 1/25 hp pump would be better? try and slow the water down to buy them some time? also do you think the loop that i replaced would have wornout fast because its a shorter loop from the pump? just want to knock this around and decide what to tell them. the cost on taking care of the other flooded unit came close to tapping out the HOA.