A bit off the Piranha topic ( no experience ) but does concern hoses, specifically braided flex hoses. From the DGX website:
Keep in mind that all SCUBA hoses will fail sooner or later either due to age, storage conditions or handling. Scuba hoses, regardless of brand and materials, require some minimal care. Do not allow hoses to receive prolonged exposure sunlight, as the heat and UV from strong sunlight will significantly shorten the life of the hose. Do not attempt to flush the inside of the hose with any form of solvent or other chemical, new hoses are factory clean and if you have any reason to think they are no longer clean then the hose should be replaced. Prior to every dive trip you should always pressurize and inspect your hoses for mechanical damage, corroded fittings, bulges and leaks.Dive Gear Express suggests replacing all SCUBA hoses every five years or 500 dives, whichever comes first.
The Alert Diver article titledAir Hoses: A Closer Look has triggered some inquiries regarding material used in the construction of our double braided flex hoses. We've reached out to all our hose suppliers and they assure us we are not receiving any hose constructed with an inner lining of Polyester-basedThermoplastic Polyurethane (TPU). Unlike "ether" based TPU, the "ester" based version of TPU can undergo changes calledhydrolysisthat cause rapid failure of the hose in hot and humid conditions.
Miflex branded hoses are constructed with an inner lining of Polyether-based TPU. Dive Gear Express flex hoses are constructed with an inner lining of High Syntactic Polyvinyl Chloride. Regardless, neither is Polyester-TPU and in our history with all the double braided flex hoses we've sold, we've never received a returned hose that exhibited anything we think could be the hydrolysis problem described in the Alert Diver article.
Keep in mind that all SCUBA hoses will fail sooner or later either due to age, storage conditions or handling. Scuba hoses, regardless of brand and materials, require some minimal care. Do not allow hoses to receive prolonged exposure sunlight, as the heat and UV from strong sunlight will significantly shorten the life of the hose. Do not attempt to flush the inside of the hose with any form of solvent or other chemical, new hoses are factory clean and if you have any reason to think they are no longer clean then the hose should be replaced. Prior to every dive trip you should always pressurize and inspect your hoses for mechanical damage, corroded fittings, bulges and leaks.Dive Gear Express suggests replacing all SCUBA hoses every five years or 500 dives, whichever comes first.
The Alert Diver article titledAir Hoses: A Closer Look has triggered some inquiries regarding material used in the construction of our double braided flex hoses. We've reached out to all our hose suppliers and they assure us we are not receiving any hose constructed with an inner lining of Polyester-basedThermoplastic Polyurethane (TPU). Unlike "ether" based TPU, the "ester" based version of TPU can undergo changes calledhydrolysisthat cause rapid failure of the hose in hot and humid conditions.
Miflex branded hoses are constructed with an inner lining of Polyether-based TPU. Dive Gear Express flex hoses are constructed with an inner lining of High Syntactic Polyvinyl Chloride. Regardless, neither is Polyester-TPU and in our history with all the double braided flex hoses we've sold, we've never received a returned hose that exhibited anything we think could be the hydrolysis problem described in the Alert Diver article.
