rain fed flush faucet

thingiverse

As water is becoming a precious good, I wanted to try using rain to cover one of the biggest house water consumption, the toilets flush. By chance our toilet flush lays back to one of our house external wall. So the intake could easily by fed through a hole in that wall from an external tank. As it is in constant contact with water, at least the main body can't be printed in PLA. I use ABS. additional hardware =============== To complete the assembly, one will need : - a long M6 screw - 2 x 3mm rods, I used carbon rods - a neodymium magnet about 2x3x6 mm - a big rubber washer. I made mine from a used bike inner tube - if silence is required, a 10 mm diameter flexible tube - a check valve for the water intake - a piece of insulation foam Assembly ======== First shape the piece of foam so that it becomes a float big like about a fist and fitting in your flush (look at the picture). Then drill holes in it so that the part "flotteur v3" can be inserted in. With a file, modify a long M6 screw so that its head is not larger than its body, then place in in the dedicated hole of "flotteur v3". This will allow to adjust the maximum water level. Insert two 150 mm long and 3 mm diameter rods in the bottom part of the body. Then slide in the float through the remaining holes of "flotteur v3" part, and secure the whole assembly with the "taquet" part, which holes may have to be adjusted as it is printed for a very tight fit. Glue in place in the arm the strong magnet, and mount the arm on the body with its axis. The arm must freely move up and down. As an option, a long flexible tube can be inserted in the body output to make it a very silent flush. One or two rubber washers are placed on the body intake before mounting in the flush and prior to intake connection. The "collier" part is then forced in place to compress the rubber washer. When connecting the intake, do not forget the check valve to prevent not stop feeding by siphon effect. The rain collecting and power command =============================== For the tank, I used rain collector and external tank in which i installed an immersed pump. For the power command : - a Switching Power Supply like this one https://www.aliexpress.com/item/4001289041252.html?spm=a2g0o.order_list.order_list_main.46.6bbc5e5b4FJNd3&gatewayAdapt=glo2fra - a Switch Relay like that one https://www.aliexpress.com/item/32879884631.html?spm=a2g0o.order_list.order_list_main.41.6bbc5e5b4FJNd3&gatewayAdapt=glo2fra - a 12v sub relay - a 50 Ohms power resistor (may have to be adapted depending on your switch relay) - a simple normal diode - a reed switch sensor normally open like this https://www.aliexpress.com/item/32972570004.html?spm=a2g0o.productlist.main.17.50d534afc6Vskq&algo_pvid=e5a35e3e-486b-4a05-9906-e6c907cf6f62&algo_exp_id=e5a35e3e-486b-4a05-9906-e6c907cf6f62-8&pdp_ext_f=%7B%22sku_id%22%3A%2266666785098%22%7D&pdp_npi=3%40dis%21EUR%211.84%211.6%21%21%21%21%21%402100b77316790545819612343d0720%2166666785098%21sea%21FR%21794880339&curPageLogUid=VQ21noIRU5Rh For any modification, here is the link to the design in OnShape https://cad.onshape.com/documents/8d6cd245377e5bbfa54dafeb/w/f0a1c9bd92dd3071fe27306a/e/5c3323feae8f93c9db087614