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Created page with "Holding Tanks == Requirements == Regulations require holding tanks to be an integral part of the hull, or similarly securely attached. If attached, a neoprene buffer should..."
Holding Tanks
== Requirements ==
Regulations require holding tanks to be an integral part of the hull, or similarly securely attached. If attached, a neoprene buffer should be used between the tank and any chafing points. Tanks must have an external level indicator, and a ventilation system fitted with a flame screen. The level indicator must show when the tank is ¾ full (USA regulation 33 CFR 159.83). Consider an alarm when 75% full. If the output pipe is fitted with “Y” valves, to switch between pump-out and overboard discharge, the “Y” valve must be padlocked in Canadian waters so that sewage cannot be pumped overboard. Similar restrictions apply in USA No Discharge areas.
== Construction ==
Choices of material for a holding tank are:
* Polyethylene
* Fibreglass reinforced plastic
* Metal
== Requirements ==
Regulations require holding tanks to be an integral part of the hull, or similarly securely attached. If attached, a neoprene buffer should be used between the tank and any chafing points. Tanks must have an external level indicator, and a ventilation system fitted with a flame screen. The level indicator must show when the tank is ¾ full (USA regulation 33 CFR 159.83). Consider an alarm when 75% full. If the output pipe is fitted with “Y” valves, to switch between pump-out and overboard discharge, the “Y” valve must be padlocked in Canadian waters so that sewage cannot be pumped overboard. Similar restrictions apply in USA No Discharge areas.
== Construction ==
Choices of material for a holding tank are:
* Polyethylene
* Fibreglass reinforced plastic
* Metal
