GROW1 3/4in Circle Grommet (25pcs/Pack)

The GROW1 3/4in Circle Grommet is a durable rubber fitting designed to seal and protect tubing pass-throughs in reservoirs, totes, grow tables, and irrigation manifolds. Sold in packs of 25, these grommets are sized for 3/4-inch holes and provide a watertight, flexible seal that accommodates standard irrigation and hydroponic tubing without cracking or deforming over time.

GROW1 3/4in Circle Grommet Specifications

The following specifications are based on the product title, description, and standard rubber grommet conventions for this size class. Values marked (unverified) are typical for this product category but are not explicitly confirmed in the canonical product data.

Specification	Value
Brand	Grow1
Supplier SKU	602075
Nominal Size	3/4 inch (0.75 in)
Material	Durable rubber
Shape	Circle (round)
Pack Quantity	25 pieces per pack
Primary Application	Hydroponic and irrigation systems
Compatible Tubing	Standard 3/4 in hydroponic and irrigation tubing (unverified)

Why Choose the GROW1 3/4in Circle Grommet

Grommets are a small component that make a large difference in system reliability. A poorly fitted or low-quality grommet leads to slow leaks, air infiltration, and tubing that pulls free under water pressure. The GROW1 3/4in Circle Grommet addresses these failure points with a few practical design choices:

• Durable rubber construction: Rubber maintains its flexibility across the temperature range typical of indoor growing environments, resisting the brittleness that affects harder plastics over time. It compresses to form a tight seal and returns to shape without cracking after repeated insertions.
• Purpose-built for hydroponic and irrigation use: These grommets are sized and specified for the fittings and tubing diameters commonly used in NFT channels, deep water culture systems, drip irrigation manifolds, and reservoir lids. The 3/4-inch nominal size aligns with widely available bulkhead fittings and supply line tubing.
• Pack of 25 for system builds and maintenance: Buying in a 25-piece pack makes sense when outfitting a full reservoir setup, building a distribution manifold, or keeping spares on hand. A single leaking grommet can interrupt an entire run; having replacements available avoids unplanned downtime.
• Grow1 brand consistency: Grow1 (distributed by DL Wholesale) offers a range of irrigation and hydroponic accessories designed to work together. Using matched components from one product line reduces compatibility guesswork when specifying a build.

Best Uses for the GROW1 3/4in Circle Grommet

This grommet is a general-purpose fitting for any grow setup that requires a sealed pass-through at a 3/4-inch hole. Common applications include:

• Reservoir and tote lids: Drill a 3/4-inch hole in a plastic lid or sidewall, seat the grommet, and pass your fill/drain tubing, air line, or nutrient feed line through it. The grommet seals the hole against light leaks and keeps the tubing from chafing on bare plastic edges.
• NFT and DWC channels: Nutrient Film Technique and Deep Water Culture systems often use bulkhead fittings seated in grommets to connect channels to a central reservoir. The 3/4-inch size covers many standard feed and return line configurations.
• Drip irrigation manifolds: When routing feed lines through a header board, cabinet wall, or tray divider, a grommet protects the tubing and prevents abrasion wear at the hole edge — a common cause of slow leaks in mature drip systems.
• Flood and drain (ebb and flow) trays: Fill and drain ports on ebb-and-flow trays typically require a grommet behind the standpipe fitting to prevent seepage around the fitting threads.
• Grow tent reservoirs and external pumping: When running supply or return lines through a reservoir wall or out through a tote to an external pump or air pump, grommets keep the pass-through clean and sealed.
• Irrigation line repairs and upgrades: Having a 25-piece pack on hand means you can re-seal existing holes, add new tap points to a distribution manifold, or replace aged grommets during a system refresh without waiting on a single-piece order.

Compatibility

The GROW1 3/4in Circle Grommet is designed for use with standard 3/4-inch hydroponic fittings and irrigation tubing. It seats in a 3/4-inch drilled or punched hole in common grow system materials including HDPE totes, polypropylene reservoir lids, PVC channel covers, and ABS distribution boards.

For growers managing larger systems with multiple measurement points or needing to monitor water quality through pass-through sensor housings, pairing these grommets with quality monitoring equipment improves system reliability. An accurate EC monitoring solution such as the Apera GroStar GS3-E replacement EC electrode helps maintain target nutrient concentrations when your irrigation tubing and reservoir fittings are properly sealed.

If your system uses a reverse osmosis pre-treatment stage, line quality also matters at every fitting. Grommets used on RO output lines and post-filter supply runs benefit from the same rubber flexibility that prevents micro-cracking at tubing entry points. Systems such as the HydroLogic Micro 75 GPD reverse osmosis system use similar-diameter supply and output lines where properly fitted grommets protect the tubing where it passes through cabinet walls or reservoir lids.

This grommet is not intended for high-pressure applications beyond the static head pressure typical of gravity-fed and low-pressure pump-fed hydroponic systems. It is not a substitute for a threaded bulkhead fitting where back-pressure or a positive seal under sustained pump pressure is required.

Sources & Further Reading