1.0Ferncohttps://www.fernco.de/frrich600338<blockquote class="wp-embedded-content" data-secret="2O6BMDF0ca"><a href="https://www.fernco.de/fr/produit/check-valve-mwstop-cv">Check Valve MwStop® CV</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.fernco.de/fr/produit/check-valve-mwstop-cv/embed#?secret=2O6BMDF0ca" width="600" height="338" title="“Check Valve MwStop® CV” — Fernco" data-secret="2O6BMDF0ca" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> https://www.fernco.de/wp-content/uploads/2025/02/MW_700x394.png700394The Check Valves MwStop® are installed directly in wastewater pipes and protect against flooding, heavy rain and overloading of the drainage system. Offers optimum protection, prevents damage and keeps out sewage odours Available in different sizes and variants, suitable for all standard pipe diameters Quick installation in just a few simple steps Suitable for residential buildings and public infrastructure Made of high-quality V4A (1.4404) and EPDM as standard for a long service life and reliable functionality Can be installed in the inlet and outlet of the duct system, horizontally or vertically H₂S-resistant Available with membrane hardnesses for 0.3 bar, 0.5 bar and 0.8 bar