sub irrigate planter

I have some hempy buckets made that I've only top watered with and planning next grow to use them again but want to bottom feed them from a down pipe but without a resivour..question is is possible to water an all soil hempy without using a wicking media reservoir, I have a backup plan to use...

The Basics Breeder/Strain - Barney's Farm Ayuhuasca Purple (Fem) Tent - 2x3x6 Light - HLG's 260w QB648 (2x diablo boards on a single heatsink) running at about 80% power @ 18in above canopy - First grow under the new light, switched over from a 250w HPS Ventilation - 4in 180cfm inline...

Info's Organic Projects 2018 No-Till ~ Sub Irrigated ~ Probiotic Updated Clackamas Coots Soil "Cooking" for 2 Months Open to Questions/Comments/Concerns The Mix 1 plant per 15 gal tote 4 - Gal - Canadian Sphagnum Peat Moss (25%) 4 - Gal - Castings/Compost (25%) 7 - Gal - Aeration (50%)...