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Jackel

Jackel SMR16101-CV

Sealed radon sump cover

  • Sump cover
  • Jackel SMR16101-CV
  • Jackel SMR16101-CV, photo 2 of 4
  • Jackel SMR16101-CV, photo 3 of 4
  • Jackel SMR16101-CV, photo 4 of 4

Photos: Jackel

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  • Every figure checked against the specifications Jackel publishes
  • The maker's own figures and limits, shown the same way for every part, unranked
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About this item

As Jackel states it

  • Warranty: Jackel's warranty page: structural foam basins and lids are warranted to the original consumer purchaser for as long as the original consumer owns their home; all other Jackel products one year; limited to repair or replacement, labor excluded. The page does not name the SMR16101-CV, whose cover and riser are HDPE structural foam.

The SMR16101-CV is one of Jackel's Original Radon Sump Domes: a 28 inch outer diameter cover and riser in HDPE structural foam that attaches to the basement floor over an existing sump, with discharge and vent flanges, a cord grommet and an acrylic access cover. Jackel lists it for use in a passive radon mitigation system or to retro-fit an existing basement sump system. It is a part of a radon system, not a radon fix on its own.

What you get

Jackel lists the cover and riser, discharge and vent flanges, an access cover, a cord grommet, a reusable seal, and stainless steel bolts and washers. The access cover is acrylic, the flanges ABS or PVC, and the grommet and seal PVC. The product page does not list the vent pipe or the fasteners into the floor; Jackel publishes a separate installation guide for this model.

In the box and running costs

How it works

What it does and how

What it is made of and the job it does in a system, then who has checked it

How it works

In our words, from the maker's documents

An open sump pit is a hole through the slab into the soil and gravel under the house. The EPA's Building Radon Out guide lists sumps among the pathways for radon to enter a basement and says an open sump may allow radon into the house from beneath the entire foundation, so its advice is to cover and seal the sump.

Jackel's dome does that job over a pit that is already there. Jackel says the riser attaches directly to the basement floor to create a radon tight seal over the sump system, and that the removable cover is molded as one single piece. The cover and riser are HDPE structural foam, the flanges are ABS or PVC, the grommet and the seal are PVC, and the bolts and washers are stainless steel. Jackel lists an outer diameter of 28 inches, an inner diameter of 24 inches, a bolt circle of 26-1/2 inches, a height of 4 inches and a weight of 12 pounds.

A sealed sump can play two parts in a radon system. In a passive system, the pipe from the sump relies on natural pressure differences rather than a fan; the EPA says passive subslab suction is generally not as effective in reducing high radon levels as active suction, and that a qualified mitigator can add a vent fan to a passive system if a test shows 4 pCi/L or more. In an active system, the EPA describes sump-hole suction: the sump is capped so that it can continue to drain water and serve as the location for a radon suction pipe. Jackel's product page names the passive use and the retrofit; it does not say whether the SMR16101-CV is rated for a pipe under fan suction, which is a question for Jackel and your mitigator.

The access cover is the model's distinguishing part within Jackel's range, and its material is acrylic. The EPA's Building Radon Out guide suggests a sump cover with a transparent door or see-through viewing window, because removing and resealing the whole cover is otherwise needed every time the pump is serviced.

What the manufacturer says

Jackel's own statements, attributed

  • Jackel saysJackel states the dome is for use in a passive radon mitigation system or to retro-fit an existing basement sump system.
  • Jackel saysJackel states the riser attaches directly to the basement floor to create a radon tight seal over the sump system.
  • Jackel saysJackel states the removable cover is molded as one single piece, making it exceptionally strong and durable.
  • Jackel saysJackel states discharge and vent flanges are included along with an access cover and a cord grommet, with a reusable seal and stainless steel bolts and washers.
  • Jackel saysJackel states the dome is ready for quick and easy installation and is made in the USA.
  • Jackel saysJackel states its structural foam basins and lids are warranted to the original consumer purchaser for as long as that person owns the home.

These are Jackel's own statements, attributed to it. They are not our findings, and we have not tested this product ourselves.

Independent evidence

Who checks a device like this

C-NRPP's consumer evaluation covers electronic radon monitors, not the parts of a mitigation system, so it has no result for Jackel SMR16101-CV. The standards and results the maker states are under “What the manufacturer says”, and what shows whether radon in your home is lower is a radon test after the work is done.

Specifications

Specifications

Every figure as the maker states it

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The maker's figures

Type
Sealing material, radon sump cover (sealed dome over an existing sump pit)
Made of
Not stated by the manufacturer
Package
Not stated by the manufacturer
Warranty
Jackel's warranty page: structural foam basins and lids are warranted to the original consumer purchaser for as long as the original consumer owns their home; all other Jackel products one year; limited to repair or replacement, labor excluded. The page does not name the SMR16101-CV, whose cover and riser are HDPE structural foam.

What is in the box

Jackel lists the cover and riser, discharge and vent flanges, an access cover, a cord grommet, a reusable seal, and stainless steel bolts and washers. The access cover is acrylic, the flanges ABS or PVC, and the grommet and seal PVC. The product page does not list the vent pipe or the fasteners into the floor; Jackel publishes a separate installation guide for this model.

Jackel's warranty page covers its structural foam basins and lids, free from defects in material and workmanship, for as long as the original consumer owns the home, and all other Jackel products for one year. The page does not name the SMR16101-CV; its cover and riser are HDPE structural foam. Labor is excluded, and proof of purchase by the original consumer is required for a claim.

What it costs to run

The dome itself has no motor and draws no power. What costs time is access: every full removal of the cover means resealing it, which is why the EPA suggests a cover with a viewing window or door. Jackel lists the seal as reusable and the access cover as acrylic, though its text does not give the access cover's size.

The larger running cost is testing. The EPA says a post-mitigation radon test should be done within 30 days of a system's installation, and that it is a good idea to retest at least every two years to be sure radon levels remain low. If a passive system is not enough, the EPA's next step is a vent fan added by a qualified mitigator, which brings electricity, and the EPA notes fans may last for five years or more.

Fit and setup

Who it fits, and installation

The fit, then how it goes on and what the standards ask

Who it fits

Good fit if, and look elsewhere if

Good fit if

  • Your basement has an open or loosely lidded sump pit and you want a sealed cover over it, as the EPA advises.
  • You want a Jackel dome that comes with an acrylic access cover, which only this model of Jackel's four lists.
  • A certified mitigator has asked for a sealed sump cover as part of a passive or active system design.
  • The pit opening fits inside Jackel's 24 inch inner diameter and the floor around it is sound enough to attach the riser to.

Look elsewhere if

  • You hope a sealed sump alone will bring a high radon test down; the EPA does not recommend sealing alone.
  • Your sump also takes surface water from the floor and needs a trapped drain in the cover; Jackel's page does not mention one.
  • Your pit or the slab around it will not fit a 28 inch outer diameter riser on a 26-1/2 inch bolt circle.
  • You need a cover the maker rates for a pipe under fan suction; Jackel names passive mitigation and sump retrofits and does not mention fan suction.

Installation

3 steps

  1. Jackel's own setup points are short: the riser attaches directly to the basement floor over the sump, the cover is removable, the seal is reusable, and the bolts and washers are stainless steel. Jackel publishes an installation guide and a dimensional drawing for the SMR16101-CV beside the product sheet. Its warranty page recommends using a professional plumber for all installation and repair, and periodic inspection of Jackel products.
  2. The EPA's rules for any sump cover add useful checks. Its 1994 Radon Mitigation Standards say sump pit covers shall be made of durable plastic or other rigid material designed to permit air-tight sealing, sealed with silicone or another non-permanent caulk or an air-tight gasket so the cover can come off for pump service, and that penetrations for wiring, discharge pipes or vent pipes shall be sealed with caulk or grommets. The same standards say that where the sump is the basement's only protection from surface water, the cover shall be recessed and fitted with a trapped drain.
  3. If the sealed sump becomes part of an active system, the EPA recommends a qualified radon mitigation contractor, and many states require radon professionals to be licensed, certified or registered. The EPA's standards also say that where radon vent pipes are installed in sump pits, the system shall be designed with removable or flexible couplings so the cover can still come off for sump pump maintenance.

For how the sealing, the gauge and the fan work together, see radon mitigation systems, and to find someone to design and install one, radon mitigation professionals.

Compare

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The same three rows for each, and the one difference that matters

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Questions

Questions people ask

6 questions about the Jackel SMR16101-CV, answered

Asked about the SMR16101-CV

Will sealing my sump pit fix a radon problem by itself?

Not on the EPA's evidence. The EPA does not recommend the use of sealing alone to reduce radon, because by itself sealing has not been shown to lower radon levels significantly or consistently. It does say sealing limits the flow of radon into the home, making other radon reduction techniques more effective and cost-efficient. A sealed sump is one of those openings handled well, not a substitute for a tested system.

Can a radon fan pull through this dome?

The EPA describes sump-hole suction as a variation of subslab and drain tile suction, with the sump capped so it can continue to drain water and serve as the location for a radon suction pipe, and lists it at 50 to 99 percent reduction, with the note that it depends on air moving easily to the sump from under the slab. Jackel's product page lists the SMR16101-CV for passive radon mitigation and retrofits and does not address fan suction, so ask Jackel and a certified mitigator before using it on an active system.

How do I know it fits my sump pit?

Jackel gives the dimensions rather than a list of basins: a 28 inch outer diameter, a 24 inch inner diameter, a 26-1/2 inch bolt circle and a 4 inch height. The riser sits on and attaches to the basement floor around the pit, so measure the opening and check the slab around it. Jackel also publishes a dimensional drawing for this model.

How is the SMR16101-CV different from Jackel's other radon domes?

Jackel's 2025 catalog shows four Original Radon Sump Domes at 28 inches outer diameter: the SMR114-V, the SMR16101, the SMR16101-B and the SMR16101-CV. The SMR114-V has a split cover for easier access to the pump; the SMR16101 models have a one-piece cover. Only the SMR16101-CV lists an access cover, in acrylic.

What warranty does Jackel give?

Jackel's warranty page gives its structural foam basins and lids a warranty for as long as the original consumer owns the home, and other Jackel products one year, limited to repair or replacement. It excludes labor and installations that break plumbing, housing or building codes or Jackel's written instructions, and it says damage from cracking or settling of foundations, improper installation or freezing voids the warranty.

Do I need to test again after the cover goes on?

Yes. The EPA says a post-mitigation radon test should be done within 30 days of system installation, but no sooner than 24 hours after the system is in operation, and that it is a good idea to retest at least every two years.

What to do next

Updated October 8, 2026