My Shurflo 4008 is fed by 2, 5/16 lines going into a 3 way star fitting; I just plug the 3rd barb on the fitting. If I wanted to add another 5/16 onto the 3rd barb for a recirc line, what kind of needle valve would fit in-line on the 5/16 recirc line? I think I'd prefer the needle valve over the ball-valve.
2020 - 1st year - 13 black walnut taps - 4 bottles syrup
2021 - 50 taps, 22 black walnuts/28 red maples - 4 gallons syrup
2022 - 54 taps, 11 black walnuts/41 red maples, 20 on solar shurflo vacuum - 8.5 gallons syrup
2023 - 47 taps on 45 red maples, 43 on solar shurflo vacuum