No-Hub Fitting Restraints: Why You Should Ditch Field-Devised Methods
Creating field-devised no-hub fitting restraints may seem like a good "quick fix" during a big job. In reality, the risks and overall costs associated with these ad hoc methods may not be worthwhile in the end.
Field methods may allow your project to pass the system test, but what happens in the long run? Can you truly trust these makeshift restraints to stand up to hydraulic jump thrust conditions down the line? There's nothing worse than finding out a completed project failed later on, especially when a workable solution was available.
Here’s why these kinds of restraints fall short every time and what you should use instead for long-lasting, professional results.
Problems with Field-Devised No-Hub Fitting Restraints
One commonly used field method is using a riser clamp to create a restraint system for soil pipes and fittings. However, riser clamps aren’t designed to be a thrust restraint. You can't be sure if this solution provides enough grip strength, a potentially catastrophic situation in the event of a significant rain event or other high-thrust situation.
This example demonstrates the potential issues all field-devised no-hub fitting restraints present:
- Though current codes do not specify means or methods in this category and field-devised methods are generally accepted, the authority having jurisdiction, or AHJ, may require a proven engineered solution.
- There’s no standardization or uniformity.
- They’re labor intensive.
- They’re constructed with untested methods and materials.
Benefits of Engineered No-Hub Fittings Restraints
When you invest in an engineered solution, you're making a decision that can support the long-term outcome of the project — and your final budget.
HoldRite's #117 Series no-hub fitting restraints are the ideal solution for restraining hubless cast iron soil pipes against separation, even during a hydraulic jump or high-thrust conditions that can overtax makeshift field methods. Here are a few reasons to swap out those makeshift methods for this engineered restraint.
Time and cost savings. Using what you readily have on hand may present immediate cost savings, but when you add up all the associated costs, engineered solutions come out as the clear winner every time. Each field-created restraint can take your crew at least 30 minutes per fitting, but solutions like the #117 Series install in minutes without on-site cutting, bending, measuring or modifications. This will save you a great deal of time per fitting, significantly reducing overall labor costs.
Quick inspection approvals. Time is money on the job site, which means delays come at a big price. With a makeshift method, there’s no guarantee the restraint will provide a final product that will pass inspection. If it doesn’t, your team will have to start from scratch, putting a dent in your bottom line and reputation.
The #117 Series meets cast iron soil pipe manufacturers’ installation recommendation and International Plumbing Code requirement to restrain hubless cast iron 5 in. and larger so you can feel confident about passing local systems tests. HoldRite follows recommendations laid out by leading no-hub cast iron manufacturers, and the Cast Iron Soil Pipe Institute (CISPI).
Peace of mind. There’s an inherent risk associated with using untested methods and materials — a gamble that, if the system fails, can have long-term consequences on your ability to secure future jobs. But engineered solutions can offer more security. Simply look for the approvals and listings on options out there to confirm their reliability. The #117 Series adds an additional layer of assurance by undergoing third-party lab tests — no other manufacturer currently offers this level of security.
Versatility. Using a specific manufactured solution for your no-hub fitting restraints doesn’t throw a wrench in your installation process either. HoldRite engineered solutions, for example, don't affect other manufacturers' ratings or limitations on their pipe or system components. They won't increase allowable pipe restrictions, either, or affect fitting or coupling system performance
More About HoldRite #117 Series No-Hub Fitting Restraints
HoldRite goes beyond the basics with its no-hub fitting restraints to offer outstanding value and unparalleled reliability by:
- Preventing separation of no-hub pipe fittings at changes of direction or straight, inline joints.
- Protecting against water blow-outs in rain leader systems.
- Supporting joints from both longitudinal movement separation and diagonal misalignment.
- Using durable stainless steel, black iron, and/or rust-resistant, zinc-galvanized components.
- Featuring a straightforward and quick installation that requires no special tools.
- Offering different sizes and restraint types to meet various soil pipe restraint fitting specifications.
Each restraint comes as part of a kit with all the necessary components, so you'll be able to calculate associated costs accurately from the beginning of your project. Every kit includes your choice of sizes and the right number of galvanized straps, stainless steel band clamps and any associated parts needed for specialized components.