Z.B. dieses:
https://www.amazon.de/Kombinatios-Eckventil-Fettkammeroberteil-Ger%C3%A4teanschlussventil-R%C3%BCckflussverhinderer-Schlauchverschraubung/dp/B0017VIECC/ref=sr_1_5?dib=eyJ2IjoiMSJ9.oj4yIQ5O7g8EAz4y0RxCAp267g0mVcbi6m0WCv1wAWA8XQLO-culkkRK83TuKQeb3HIF5xzQKSsfpLBF5CbEjHPyUKpqLr3DFBFy_Ki13r9dA50PSxu0sGNCr3ChhDN4gttMz7TiX-zx8iA4oemab13mu8vCKcmnnKlhik8p_9nTm0ZAqGzV3xZJU5vPOUOE22e_CDppha7U82vW4okwwrVem-I0IuTj8HWlycjJgzWS6Bp-Ai31W3SC8FCAkBmjgC4VXbwPNdu9b4HP8sJZCbPFAxXo95lmQhI5wQZuF-8.UEs2B_yoF5SVdzhrqF_PgGhTRXE0TRQGk69E6VcpaDE&dib_tag=se&keywords=Kombi-Eckventil&qid=1718110331&sr=8-5