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Washing Machine & Dish Washer. Do they need Check Valves?

Discuss Washing Machine & Dish Washer. Do they need Check Valves? in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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wild nomad

Hi there,

Need to install a washing machine & dishwasher. Do they have there own integral check valves or do I need to add them?

Thanks in advance :)
 
No you dont.

Dishwashers dont back fill because they have a siphonic tank that has an air gap.

washers have a built in air gap.

Fixed maybe 15 to 20 000 of the bstards years ago fot hotpoint and brut'ish gas
 
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Sorry you were too quick before I realised my fat fingered typing mistake

Read above
 
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If its in a very low pressure area.
If you pull the gause filter out of the solenoid inlet / hose connector.
Get a pair of long nose pliers and if you look carefully inside. There is a rubber o ring restrictor.

Just pull it out to improve things.
Good pressure = no need
 
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