1)reliable, low price, 2)one year quality guarantee, 3)CE approval. 4)20days leadtime This test pump is for testing the pipe lines after installing , gas and water pipe system can be tested .our power test pump is in top quality ,one years quality guarantee.220/110V, 50HZ/60HZ optional.we have two model: 3L/Min. and 6L/Min. electric pressure test pump