ESTUARINE WATER SYSTEMS AT SOLOMONS, MD. 



Ill 



Fire hose for diverting backwash 

 (rolled and clamped when not in use) 



; 



backwash tank 



Figure 8. — Main system (dual). 



with the equipment and a lack of adequate 

 manufacturers' instructions concerning 

 maintenance requirements. It is felt that 

 our present schedule will enable us to op- 

 erate on a more satisfactory basis. 



Our aim of producing water at a low 

 pressure was answered in a most hearten- 

 ing manner when numbers of small 

 medusae of Chrysaora q. quinquecirrha 

 were observed swimming in several of the 

 tanks. These were about 1 to 11/^ inches 

 in diameter and appeared to be in excel- 

 lent condition. Since that time, practi- 

 cally all of the local larval forms have 

 passed through the pumps successfully 

 and most have metamorphosed in the 

 trough or tanks. Thus, our present feel- 

 ing is that these pumps are worth the ef- 

 fort and expense. 



We have had several failures due to cir- 

 cumstances which could not be counter- 

 acted at the time of their occurrence. It 



is therefore strongly recommended that a 

 safety switch and relay be made a part 

 of any system so that a stoppage or slow- 

 ing of the water flow for any reason will 

 shut off the pump, thus protecting the unit 

 from serious damage. Of equal impor- 

 tance is the provision for thermal over- 

 load protection for each motor. We re- 

 cently lost a motor because of a low-volt- 

 age condition which caused the field wind- 

 ings to overheat and short-circuit. 



The following is a list of suppliers of 

 the components we have used in our 

 system. 



Centrifugal pumps : American Hard Rubber 



Co., Butler, N.J. 

 Moyno pumps : Bobbins & Myers, Springfield, 



Ohio. 

 PVC and hard-rubber valves, pipe, fittings : 



American Hard Rubber Co., Butler, N.J. 

 PVC and hard-rubber valves, pipe, fittings: 



Vanton Pipe and Equipment Co., Hillside, 



N.J. 



