A DIY solution for connecting two reservoirs or tanks together without leaks using electrical conduit fittings and basic PVC components – a cheaper alternative to bulkhead fittings. We used this to increase the reservoir capacity for our indoor hydroponic system, but this could also be used for other applications such as rain barrels.

FREE guide for building a hydroponic system:
https://www.simplegreenshydroponics.com

Supplies Used (*some are affiliate links):
1″ PVC Male Conduit Fitting: homedepot.sjv.io/rYgqB
1″ PVC Female Conduit Fitting: homedepot.sjv.io/P7avM
1″ PVC Ball Valve Slip x Slip: https://homedepot.sjv.io/A7K1J
1″ PVC Union: https://homedepot.sjv.io/L7Dd3
#45 O-Ring (1-3/8″ OD x 1-3/16″ ID x 3/32″ Wall): https://tinyurl.com/y9hpwjag
1″ PVC Pipe (to connect each piece): https://homedepot.sjv.io/Wom1M