Typically every year I flush the boat A/C lines to remove anything that may have attached itself to the inside of the copper lines by mixing 25% muriatic acid and water then circulating it through the system. I put the mixture in a 5gal bucket with a 500gph bilge pump. The bilge pump has a hose running to the ac water inlet side and another hose is attached to the water outlet side returning back to the bucket. I let it circulate for 3-4 hrs on each unit. This seems to work fine although it does not remove any residue from the AC hoses or the strainer. Is this a big deal? My question is there a simpler or better way of doing this and also does someone out there make a bucket with fittings on the sides for this purpose?