DeerValley vs HOROW: Dual Flush Toilets Compared

What dual flush means for water use

Dual flush toilets give you two buttons or levers: one for liquid waste that uses less water, and one for solid waste that uses the full flush volume. According to the US EPA, a WaterSense labeled dual-flush toilet lets you choose a reduced flush mode that uses a smaller volume of water to remove liquid waste. Toilets are the main source of indoor water use in the home, accounting for nearly 30 percent of an average home's indoor water consumption. Replacing older, inefficient toilets with WaterSense labeled models can reduce water used for toilets by 20 to 60 percent, saving nearly 13,000 gallons per year for the average family.

The current federal standard allows up to 1.6 gallons per flush, but WaterSense labeled toilets use 1.28 gallons per flush or less. For dual flush models, the reduced flush mode typically uses significantly less than the full flush. If you want a deeper look at how the two flush modes interact with waste handling, see the learn article on dual flush versus single flush waste handling.

• Reduced flush mode handles liquid waste with a smaller water volume.
• Full flush mode clears solid waste using the maximum flush volume.
• WaterSense labeled dual flush toilets meet EPA performance criteria for both modes.

Flush volume: how DeerValley and HOROW compare

Both DeerValley and HOROW manufacture dual flush toilets that target the WaterSense threshold of 1.28 gallons per flush or less. DeerValley's dual flush models typically use a full flush of 1.28 gallons and a reduced flush around 0.8 to 0.9 gallons, while HOROW's offerings follow a similar pattern, with full flush volumes around 1.28 gallons and reduced flushes near 0.8 gallons. These figures fall within the range that the EPA considers efficient for a WaterSense labeled toilet.

The practical difference between the two brands is not the number on the spec sheet but how the flush is delivered. DeerValley tends to use a gravity-fed siphonic system with a wider glazed trapway, which helps waste clear in one full flush. HOROW also uses gravity-fed flush systems but often pairs them with a larger water surface area and a different trapway geometry. Both approaches can meet the same performance criteria if the toilet carries WaterSense certification, but the feel of the flush, the noise level, and the cleaning behavior may differ.

For a detailed breakdown of how flush volumes translate into performance, read the learn article on toilet flush volume.

Trapway design and flush performance

The trapway is the curved channel that connects the bowl to the drain. Its diameter, shape, and surface finish directly affect how well waste clears and how likely the toilet is to clog. A wider, smoother trapway lets water and waste pass with less resistance, which is especially important for dual flush toilets because the reduced flush mode uses less water to push waste through.

DeerValley dual flush toilets generally use a trapway that is fully glazed, meaning the interior surface is covered with the same ceramic glaze as the bowl. This reduces friction and helps prevent waste from sticking. Many DeerValley models are one-piece toilets with a concealed or skirted trapway, which makes the outside easier to clean but does not change the interior diameter. HOROW also uses glazed trapways on most models, but the trapway is often visible on two-piece designs, and the interior diameter can vary by model.

When comparing trapways, look for the actual diameter in millimeters rather than the shape. A trapway of 2 inches or more with a full glaze performs better than a narrower or partially glazed channel. For more on how trapway geometry affects flushing, see the learn article on toilet trapways and the learn article on trapway versus flush valve size.

Build quality: materials and construction

Both brands use vitreous china, the standard material for toilet fixtures, but the quality of the casting and the glaze application can vary. DeerValley is known for its one-piece toilets with a seamless design that reduces crevices where dirt and bacteria can collect. The glaze on DeerValley models is typically applied in multiple layers, which gives the surface a smooth, non-porous finish that is easier to wipe clean. HOROW also uses vitreous china with a glazed finish, and many of their models are one-piece as well, though they also offer two-piece options.

One area where the two brands differ is in the hardware. DeerValley uses a proprietary flush valve system that is designed to be durable and quiet, with a slow-close seat as standard on many models. HOROW uses standard flush valves and offers slow-close seats on most of their toilets. The weight of the toilet is another clue to build quality: a heavier toilet generally indicates denser ceramic and a more solid construction, which also means less noise and vibration during a flush.

If you are deciding between a one-piece and a two-piece toilet, remember that one-piece models are heavier and harder to lift during installation but easier to clean because there is no seam between the tank and bowl. Two-piece models are lighter and easier to handle but have a visible seam. For a deeper comparison, see the learn article on one-piece versus two-piece toilets.

Installation and rough-in fit

Both DeerValley and HOROW offer dual flush toilets in the standard 12-inch rough-in, and some models are available in 10-inch or 14-inch configurations. Before you choose a model, measure the distance from the wall to the center of the floor flange, since that determines which rough-in size fits. The toilet rough-in sizes article explains how to measure this accurately.

DeerValley's one-piece models are heavier, typically weighing 80 to 110 pounds, so plan for two people to move and set the toilet. HOROW's two-piece models are lighter, around 60 to 80 pounds, which makes them easier for a single person to install. Both brands include a wax ring or rubber gasket and the necessary mounting bolts in the box, but you should confirm the contents before starting.

If you are replacing an older toilet, check whether the existing flange is level and at the correct height. A flange that sits too low or too high can cause leaks regardless of which brand you choose. The article on toilet flange basics covers the common issues.

How to choose between DeerValley and HOROW

Your choice should come down to two factors: the look you want and the physical configuration that fits your bathroom. If you prefer a minimalist, seamless one-piece toilet with a skirted trapway and a soft-close seat, DeerValley is the stronger pick. Their models are designed to blend into modern bathrooms where clean lines matter, and the concealed trapway makes cleaning faster.

HOROW is the better choice if you want more flexibility in bowl shape, height, and installation type. They offer round and elongated bowls, chair height and standard height options, and both one-piece and two-piece configurations. HOROW also has more compact models for small bathrooms and wall-hung options if you need to save floor space.

For any dual flush toilet, verify that the model carries the WaterSense label or meets the 1.28 gallons per flush threshold. The EPA notes that WaterSense labeled toilets are independently certified to meet criteria for both performance and efficiency, so the label is your best guarantee that the toilet will not just save water but also flush reliably.

What to pick for your use

Questions

Which brand has a lower flush volume, DeerValley or HOROW?

Both brands target the same flush volumes, typically 1.28 gallons per flush for the full flush and around 0.8 to 0.9 gallons for the reduced flush. The actual numbers vary by model, so check the spec sheet for each model you are considering.

Are DeerValley dual flush toilets harder to install than HOROW models?

DeerValley's one-piece models are heavier, which makes them harder to lift and position. HOROW offers two-piece models that are lighter and easier for a single person to install. The rough-in size and flange condition matter more than the brand for a successful installation.

Which brand has a better trapway for avoiding clogs?

Both brands use fully glazed trapways on most models, but the diameter and geometry vary by model. A wider, fully glazed trapway, usually 2 inches or more, performs better regardless of brand. Compare the trapway diameter on the spec sheets rather than relying on the brand name.

Can I use a DeerValley or HOROW dual flush toilet with a septic system?

Dual flush toilets generally use less water per flush, which is beneficial for septic systems because it reduces the water load on the drain field. Check the model's specifications to confirm it uses 1.28 gallons per flush or less, which aligns with WaterSense efficiency targets.

Do DeerValley and HOROW dual flush toilets come with a soft-close seat?

Many DeerValley models include a slow-close seat as standard. HOROW also offers slow-close seats on most models, but you should confirm for the specific model you are buying, as some entry-level models may require a separate seat purchase.