Water Pump heater core nipple O rings size

[SirKing]

Can't seem to find out the size of the o rings on the water pump heater core nipple. Anyone know..... picture for reference

 

[MalcolmV8]

Those are high temp silicon o-rings, don't replace with local hardware store o-rings or you'll have a leak soon enough. I'm not sure where to purchase them so I get them from Ford. FYI it's cheaper to buy the whole fitting with o-rings than to purchase just the o-rings.

 

[SirKing]

OK. Anyone know the size?

 

[Tractionless1]

Delete the nipple altogether to prevent pulling the blower again just to replace friggin o-rings.