My 91 jeep wrangler has a good steady flow from the water pump and the other day the pipe that goes to the bottom radiator to the pump shot off and leaked out coolant everywere is it the pump it always over heats and i have replaced the thermostat 4 times and finally just took it out and radiators decent condition

If the pump isn't leaking or noisy, it's good. If the hose came off and the engine overheated you may have blown a head gasket (radiator hydrocarbon test is best to determine that) if you see steam from the tailpipe, coolant in the engine oil or oil in the coolant that also is a big clue.
Jeep engines tend to rust internally. the rust packs into the bottom of radiator core, especially after an overheat. Therefore, don't trust that because the radiator looks good that it is good you cannot see what's actually inside it. (you could try back-flushing but should do that with the radiator removed to do it right). If you see any improvement after flushing, replacement would be a good idea.(unless it completely works). You can use plain water in the cooling system while testing. Just don't leave the water overnight so it can freeze.