Brand New, simple sealing. Gaskets are deformed in the water cooling the leakage of the item. The exchange of the May Be Less than the minimum value in pressure release cap is highly recommended. nhw10 are available in 97 years 5 month 12 month to 00 years. NHW11 may be 00 years 5 – 03 years 8 month. NHW20 may be 03 years 8 – 09 years 5 month.