Go to www.firebottleracing.com. They are the supplier to many pro teams and sell thru Summit as well. Last time I talked to them they could do a refill. I agree that the alternate AFFF may be a better choice for the long term. We are looking at both systems now to replace our Purple K handheld.

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Grandpa's toys-modded suspensions and a few other tweaks
'89 CRX Si-SCCA ITA #99
'99 Prelude=a sweet song
'03 Dodge Dakota Club Cab V8-Patriot Blue gonna tow