Hello good afternoon, I consult my problem ... I had a hot water tank and I replaced it with a Nex brand ionized heater, I placed a rowa pressurizing pump, the problem is that when I open the hot water to turn on it feels that it sparks and apparently It accumulates a lot of gas by launching slight explosions. I thought there might be the batteries, I changed them and it's the same. Today it is costing you a lot more than to light and when you start sparking and not ignite you feel a bit of a gas smell. I clarify that the water I bought used with 5 months of use is in good condition. Could you help me? Thank you