Liquid Fertilizer System Storage Procedures with Demco™ Pumps

IMPORTANT: To prevent damage to piston pump:

Keep pump from freezing.

Remove drive chain when not in use.

IMPORTANT: To prevent damage to distribution hoses:

Remove delivery hoses from distribution manifold before adding winterizer to system. Delivery hoses are not compatible with winterizers containing Propylene Glycol or Ethylene Glycol.

Use compressed air to force water from delivery hoses and nozzles. Damage to hoses and nozzles occurs when freezing temperatures are reached.

Suspension fertilizer is not recommended for use with this system.
Clear Liquid Fertilizer
Overnight	Cooling Temperatures	Solution is likely to settle out. Draw fresh water into pump and leave filled. DO NOT admit air.
Overnight	Steady or Rising Temperatures	Leave pump and hoses filled with solution.
One to Two Weeks	Acceptable	Draw fresh water into pump to dilute and flush fertilizer solution. DO NOT DRAIN. Keep pump sealed to exclude air.
One to Two Weeks	Preferred	Increase delivery rate and operate pump by hand turning contact drive tire. Flush pump and distribution hoses thoroughly with fresh water drawn in through fertilizer tank, approximately 19—38 L (5—10 gal.). Remove delivery hoses from distribution manifold and apply enough compressed air to remove water from each hose and nozzle. Replace water with appropriate mixture of SPRAY MASTER™ Winterizer Fluid at the correct ratio to protect the system down to the lowest expected temperature. Operate pump by hand turning contact drive tire to circulate winterizer into pump and distribution manifold. Plug inlet and outlet hoses.
Winter	Preferred	Increase delivery rate and operate pump by hand turning contact drive tire. Flush pump and distribution hoses thoroughly with approximately 38—57 L (10—15 gal.) fresh warm water. Circulate until all corrosive salts are dissolved in pump. Remove delivery hoses from distribution manifold and apply enough compressed air to remove water from each hose and nozzle. Replace water with appropriate mixture of SPRAY MASTER™ Winterizer Fluid at the correct ratio to protect the system down to the lowest expected temperature. Operate pump by hand turning contact drive tire to circulate winterizer into pump and distribution manifold. Plug inlet and outlet hoses.